Cos 90 theta is equal to
Asked by maham237 @ in Mathematics viewed by 266 People
Which is the correct cofunction identity for cos theta
A. csc(90° - theta)
B. sec(90° - theta)
C. sin(90° - theta)
D. cos(90° - theta)
E. tan(90° - theta)
Answered by maham237 @
Answer:
C. sin(90° - θ)
Step-by-step explanation:
A trig function of an angle equals the cofunction of the angle's complement.
The cofunction of cosine is sine, and the complement of θ is 90° - θ.
∴ cosθ = sin(90° - θ)
Answered by maham237 @
Answer:
C. sin(90° - θ)
Step-by-step explanation:
A trig function of an angle equals the cofunction of the angle's complement.
The cofunction of cosine is sine, and the complement of θ is 90° - θ.
∴ cosθ = sin(90° - θ)
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