Question

If (sin theta + cos theta =a) and ( sin theta - cos theta =b) then = ?
options
(A) a^2 + b^2 = 1
(B) a^2 - b^2 = 1
(C) a^2 + b^2 =2
(D) a^2 - b^2 = 2​

Answer 1

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Answer 2

Answer:

option c is correct

as A2+b²=2sin ²+2cos²

#2(sin²+cos²)

#2*1 use the identity