12
AssignmentMultiple Choice
Trigonometric Double Angle Identities
Question 12 • 2025-2026 FBISD - Precalculus A (CR)
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