Question

if sin theta + cos theta equal to root cos theta then the find the value of theta​

Answer 1

AnswEr:-

sinA + cosA = √2cosA

or, sinA = √2cosA - cosA

or, sinA = cosA(√2 - 1)

or, sinA/cosA = (√2 - 1)

or, tanA = (√2 - 1)

Option—(A) is correct.