Precalculus » E. Analytic Trigonometry » E.4. Sum and Difference Formulas

Finding Exact Values of Trigonometric Functions using Sum and Difference Formulas

Overview

Find the exact value of a sine function using the sum and difference formula

Find the exact value of a cosine function using the sum and difference formula

Find the exact value of a tangent function using the sum and difference formula

Find the exact value of the expression given a sum or difference of two trigonometric functions

Find the exact value of the trigonometric function given an angle measure

Write the expression as the sine, cosine, or tangent of an angle

Find the exact value of the trigonometric function given the sine of one angle and the cosine of another angle

Simplify the trig expression algebraically using sum and difference formulas

Find all solutions of the equation in the interval

Finding Exact Values of Trigonometric Functions using Sum and Difference Formulas — Find the exact value of the expression given a sum or difference of two trigonometric functions

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