15
QuizMultiple Choice
Trigonometric Double Angle Identities
Question 15 • Precalculus
Consider the derivation of sin(2x).
Answer
A
Step 2 should read = cos(x)cos(x) – sin(x)sin(x).B
Step 2 should read = sin(x)cos(x) – cos(x)sin(x).C
Step 3 should read = – 2sin(x)cos(x).D
Step 3 should read = 2sin(x)cos(x).