Question

sin (2A + 45) = cot (30-A) then find A

Answer 1

bro, your question is wrong, it'll be cos(30-A), anyway here's your solution

Answer 2

Hey bro question is wrong. In the place of "cot" cos will be there. Here is your answer.

Sin (2A+45) = cos (30- A)

Sin(2A+45) = sin(90-(30-A))

Sin(2A+45)= sin (90-30+A)

Sin(2A+45) =sin (60+A)

Cancelling sin from both sides we get

2A+45 = 60+A

2A-A=60-45

A= 15