Question

if cos ( A + B ) = 0 and cot ( A-B ) = √3 find the value of secA.tanB - cotA . sinB

Answer 1

A+B :90
A -B :30
so A 60
B 30


2. 1/root 3-1/root3.1/2:

1/root 3

Sorry for roots
Hope ur able understand it...