Question

cos (a-B)/
cos asins
= tan a + cot B.​

Answer 1

Step-by-step explanation:

cos (a-b)/cos a.sin s = tan a + cot Bb

this is not sins. this must be sin b

LHS = cos (a-b)/cos a.sin b = tan a + cot b

= (cos a.cos b+sin a.sin b)/cos a.sin b

= cos b/sin b + sin a/cos a

= cot b + tan a = RHS

(Proved)