Trigonometry Examples

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Use the definition of tangent to find the known sides of the unit circle right triangle. The quadrant determines the sign on each of the values.
Find the hypotenuse of the unit circle triangle. Since the opposite and adjacent sides are known, use the Pythagorean theorem to find the remaining side.
Replace the known values in the equation.
Simplify inside the radical.
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One to any power is one.
Hypotenuse
Raise to the power of .
Hypotenuse
Add and .
Hypotenuse
Hypotenuse
Use the definition of sine to find the value of .
Substitute in the known values.
Simplify the right side.
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Multiply by .
Simplify.
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Combine.
Raise to the power of .
Raise to the power of .
Use the power rule to combine exponents.
Add and .
Rewrite as .
Multiply by .
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
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