Trigonometry Examples

Simplify sin(arccos( square root of 3/2))
Step 1
Draw a triangle in the plane with vertices , , and the origin. Then is the angle between the positive x-axis and the ray beginning at the origin and passing through . Therefore, is .
Step 2
Move the negative in front of the fraction.
Step 3
Rewrite as .
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Step 3.1
Rewrite as .
Step 3.2
Rewrite as .
Step 4
Pull terms out from under the radical.
Step 5
One to any power is one.
Step 6
Rewrite as .
Step 7
Any root of is .
Step 8
Multiply by .
Step 9
Combine and simplify the denominator.
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Step 9.1
Multiply by .
Step 9.2
Raise to the power of .
Step 9.3
Raise to the power of .
Step 9.4
Use the power rule to combine exponents.
Step 9.5
Add and .
Step 9.6
Rewrite as .
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Step 9.6.1
Use to rewrite as .
Step 9.6.2
Apply the power rule and multiply exponents, .
Step 9.6.3
Combine and .
Step 9.6.4
Cancel the common factor of .
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Step 9.6.4.1
Cancel the common factor.
Step 9.6.4.2
Rewrite the expression.
Step 9.6.5
Evaluate the exponent.
Step 10
Combine and .