Question

$\sin (90-\theta )$ can be written as

• A. $\cos \theta$
• B. $\tan \theta$
• C. $\sin \theta$
• D. $1$

Answer 1

Answer: (A)

$\text{Sin}(90-\theta )=\cos \theta$
[ All $+ve$ in $1^{\text{st }}$ quadrant ]