15
QuizMultiple Choice
Solving Trigonometric Equations — Unit test
Question 15 of 25 • Precalculus
Review the incomplete steps in the derivation of the tangent sum identity.Which action can be taken to the expression in Step 3 to give an expression for Step 4?
Answer
A
divide both the numerator and denominator by sin(x)sin(y)B
divide both the numerator and denominator by sin(x)cos(y)C
divide both the numerator and denominator by cos(x)sin(y)D
divide both the numerator and denominator by cos(x)cos(y)