Trigonometry Examples

Simplify square root of (1+cos(75))/2
Step 1
The exact value of is .
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Step 1.1
Split into two angles where the values of the six trigonometric functions are known.
Step 1.2
Apply the sum of angles identity .
Step 1.3
The exact value of is .
Step 1.4
The exact value of is .
Step 1.5
The exact value of is .
Step 1.6
The exact value of is .
Step 1.7
Simplify .
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Step 1.7.1
Simplify each term.
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Step 1.7.1.1
Multiply .
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Step 1.7.1.1.1
Multiply by .
Step 1.7.1.1.2
Combine using the product rule for radicals.
Step 1.7.1.1.3
Multiply by .
Step 1.7.1.1.4
Multiply by .
Step 1.7.1.2
Multiply .
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Step 1.7.1.2.1
Multiply by .
Step 1.7.1.2.2
Multiply by .
Step 1.7.2
Combine the numerators over the common denominator.
Step 2
Write as a fraction with a common denominator.
Step 3
Combine the numerators over the common denominator.
Step 4
Multiply the numerator by the reciprocal of the denominator.
Step 5
Multiply .
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Step 5.1
Multiply by .
Step 5.2
Multiply by .
Step 6
Rewrite as .
Step 7
Simplify the denominator.
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Step 7.1
Rewrite as .
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Step 7.1.1
Factor out of .
Step 7.1.2
Rewrite as .
Step 7.2
Pull terms out from under the radical.
Step 8
Multiply by .
Step 9
Combine and simplify the denominator.
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Step 9.1
Multiply by .
Step 9.2
Move .
Step 9.3
Raise to the power of .
Step 9.4
Raise to the power of .
Step 9.5
Use the power rule to combine exponents.
Step 9.6
Add and .
Step 9.7
Rewrite as .
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Step 9.7.1
Use to rewrite as .
Step 9.7.2
Apply the power rule and multiply exponents, .
Step 9.7.3
Combine and .
Step 9.7.4
Cancel the common factor of .
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Step 9.7.4.1
Cancel the common factor.
Step 9.7.4.2
Rewrite the expression.
Step 9.7.5
Evaluate the exponent.
Step 10
Combine using the product rule for radicals.
Step 11
Multiply by .
Step 12
The result can be shown in multiple forms.
Exact Form:
Decimal Form: