Question

if cos (a+b)=0 then sin (a-b)=?​

Answer 1

Step-by-step explanation:

$co s (a + b) = 0 \\ a = 60 \: \: and \: b = 30 \\ sin(a - b) = sin(60 - 30) \\ = \sin(30) \\ \sin(a - b) = \frac{1}{2}$