Question

If sin θ + cos θ = 1, then the value of sin 2θ is equal to

(A) 1 (B) 1/ 2 (C) 0 (D) –1​

Answer 1

Answer:

option (B) 1/2

.......

Answer 2

Answer:

sin theta + cos theta = 1

=> sin²theta + cos²theta + 2(sin theta)(cos theta) = 1

=> 1 + sin 2theta = 1

=> sin 2theta = 0