Question

I need help in conversation of sin to cos type like is it correct. sin(π/2+theta) = cos theta​

Answer 1

Answer:

yes, it is correct .

according to the formula

$\sin(\frac{\pi}{2} + x) \: = \cos(x)$

Answer 2

Answer:

sin(π/2+theta) = cos theta is correct

Step-by-step explanation:

π/2= 90°

sin(90+A)= cos A

sin (90+A) lies in 2nd quadrant .

Sine and cosecant values are positive in the 2nd quadrant.

Sin -> Cos

Cosec -> Sec

Sin120°=Sin(90+30)=cos 30=√3/2.