Question

If sinA + cosA = 1, then sinA x cosA =
(A) 0
(B) 1
(C) 2
(D) 1/2​

Answer 1

Answer:

it is right answer . I think 1

Answer 2

Answer:

Squaring both sides,

( sin A + cos A) ^2 = 1^2

Sin^2 A + cos ^2 A + 2 sin A cos A = 1

1 + 2 sin A cos A = 1

2 sin A. Cos A = 0

Sin A. CosA = 0

OPTION ( A )