Trigonometry Examples

Find the Exact Value sec((5pi)/12)
Step 1
Split into two angles where the values of the six trigonometric functions are known.
Step 2
Apply the sum of angles identity.
Step 3
The exact value of is .
Step 4
The exact value of is .
Step 5
The exact value of is .
Step 6
The exact value of is .
Step 7
The exact value of is .
Step 8
The exact value of is .
Step 9
The exact value of is .
Step 10
The exact value of is .
Step 11
Simplify .
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Step 11.1
Simplify the numerator.
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Step 11.1.1
Multiply by .
Step 11.1.2
Combine and .
Step 11.1.3
Combine and .
Step 11.2
Simplify the denominator.
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Step 11.2.1
Multiply by .
Step 11.2.2
Combine and simplify the denominator.
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Step 11.2.2.1
Multiply by .
Step 11.2.2.2
Raise to the power of .
Step 11.2.2.3
Raise to the power of .
Step 11.2.2.4
Use the power rule to combine exponents.
Step 11.2.2.5
Add and .
Step 11.2.2.6
Rewrite as .
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Step 11.2.2.6.1
Use to rewrite as .
Step 11.2.2.6.2
Apply the power rule and multiply exponents, .
Step 11.2.2.6.3
Combine and .
Step 11.2.2.6.4
Cancel the common factor of .
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Step 11.2.2.6.4.1
Cancel the common factor.
Step 11.2.2.6.4.2
Rewrite the expression.
Step 11.2.2.6.5
Evaluate the exponent.
Step 11.2.3
Multiply by .
Step 11.2.4
Combine and simplify the denominator.
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Step 11.2.4.1
Multiply by .
Step 11.2.4.2
Raise to the power of .
Step 11.2.4.3
Raise to the power of .
Step 11.2.4.4
Use the power rule to combine exponents.
Step 11.2.4.5
Add and .
Step 11.2.4.6
Rewrite as .
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Step 11.2.4.6.1
Use to rewrite as .
Step 11.2.4.6.2
Apply the power rule and multiply exponents, .
Step 11.2.4.6.3
Combine and .
Step 11.2.4.6.4
Cancel the common factor of .
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Step 11.2.4.6.4.1
Cancel the common factor.
Step 11.2.4.6.4.2
Rewrite the expression.
Step 11.2.4.6.5
Evaluate the exponent.
Step 11.2.5
Cancel the common factor of .
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Step 11.2.5.1
Move the leading negative in into the numerator.
Step 11.2.5.2
Factor out of .
Step 11.2.5.3
Cancel the common factor.
Step 11.2.5.4
Rewrite the expression.
Step 11.2.6
Combine and .
Step 11.2.7
Multiply by .
Step 11.2.8
Combine and .
Step 11.2.9
Combine using the product rule for radicals.
Step 11.2.10
Multiply by .
Step 11.2.11
Move the negative in front of the fraction.
Step 11.2.12
To write as a fraction with a common denominator, multiply by .
Step 11.2.13
Combine and .
Step 11.2.14
Combine the numerators over the common denominator.
Step 11.2.15
Multiply by .
Step 11.3
Simplify the numerator.
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Step 11.3.1
Multiply by .
Step 11.3.2
Multiply by .
Step 11.4
Simplify the denominator.
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Step 11.4.1
Combine using the product rule for radicals.
Step 11.4.2
Multiply by .
Step 11.5
Simplify the numerator.
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Step 11.5.1
Combine and into a single radical.
Step 11.5.2
Cancel the common factor of and .
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Step 11.5.2.1
Factor out of .
Step 11.5.2.2
Cancel the common factors.
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Step 11.5.2.2.1
Factor out of .
Step 11.5.2.2.2
Cancel the common factor.
Step 11.5.2.2.3
Rewrite the expression.
Step 11.5.3
Rewrite as .
Step 11.5.4
Any root of is .
Step 11.5.5
Multiply by .
Step 11.5.6
Combine and simplify the denominator.
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Step 11.5.6.1
Multiply by .
Step 11.5.6.2
Raise to the power of .
Step 11.5.6.3
Raise to the power of .
Step 11.5.6.4
Use the power rule to combine exponents.
Step 11.5.6.5
Add and .
Step 11.5.6.6
Rewrite as .
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Step 11.5.6.6.1
Use to rewrite as .
Step 11.5.6.6.2
Apply the power rule and multiply exponents, .
Step 11.5.6.6.3
Combine and .
Step 11.5.6.6.4
Cancel the common factor of .
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Step 11.5.6.6.4.1
Cancel the common factor.
Step 11.5.6.6.4.2
Rewrite the expression.
Step 11.5.6.6.5
Evaluate the exponent.
Step 11.5.7
Combine and .
Step 11.6
Multiply the numerator by the reciprocal of the denominator.
Step 11.7
Cancel the common factor of .
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Step 11.7.1
Cancel the common factor.
Step 11.7.2
Rewrite the expression.
Step 11.8
Combine and .
Step 11.9
Combine and .
Step 11.10
Cancel the common factor of and .
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Step 11.10.1
Factor out of .
Step 11.10.2
Cancel the common factors.
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Step 11.10.2.1
Factor out of .
Step 11.10.2.2
Factor out of .
Step 11.10.2.3
Factor out of .
Step 11.10.2.4
Cancel the common factor.
Step 11.10.2.5
Rewrite the expression.
Step 11.11
Multiply by .
Step 11.12
Multiply by .
Step 11.13
Expand the denominator using the FOIL method.
Step 11.14
Simplify.
Step 11.15
Cancel the common factor of and .
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Step 11.15.1
Factor out of .
Step 11.15.2
Cancel the common factors.
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Step 11.15.2.1
Factor out of .
Step 11.15.2.2
Cancel the common factor.
Step 11.15.2.3
Rewrite the expression.
Step 11.16
Apply the distributive property.
Step 11.17
Multiply .
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Step 11.17.1
Combine using the product rule for radicals.
Step 11.17.2
Multiply by .
Step 11.18
Combine using the product rule for radicals.
Step 11.19
Simplify each term.
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Step 11.19.1
Multiply by .
Step 11.19.2
Rewrite as .
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Step 11.19.2.1
Factor out of .
Step 11.19.2.2
Rewrite as .
Step 11.19.3
Pull terms out from under the radical.
Step 11.20
Cancel the common factor of and .
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Step 11.20.1
Factor out of .
Step 11.20.2
Factor out of .
Step 11.20.3
Factor out of .
Step 11.20.4
Cancel the common factors.
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Step 11.20.4.1
Factor out of .
Step 11.20.4.2
Cancel the common factor.
Step 11.20.4.3
Rewrite the expression.
Step 11.20.4.4
Divide by .
Step 12
The result can be shown in multiple forms.
Exact Form:
Decimal Form: