40
AssignmentMultiple Choice
Trigonometric Double Angle Identities
Question 40 • CUSD Advanced Math B (5.0)
If cos(x) = and tan(x) < 0, what is cos(2x)?
Answer
A
Negative StartFraction 3 StartRoot 7 EndRoot Over 8 EndFraction
B
Negative StartFraction 1 Over 8 EndFraction
C
StartFraction 1 Over 8 EndFraction
D
StartFraction 3 StartRoot 7 EndRoot Over 8 EndFraction