22
QuizMultiple Choice
Trigonometric Sum Identities — Unit test
Question 22 of 25 • Precalculus
What is the value of sin(80°)cos(20°) – cos(80°)sin(20°)?
Answer
A
Negative one-half
B
Negative StartFraction StartRoot 3 EndRoot Over 2 EndFraction
C
One-half
D
StartFraction StartRoot 3 EndRoot Over 2 EndFraction