Question

If sin thetha + cos thetha = 1 , then value of sin 2 thetha is equal to
a) 1 b) 1/2
C) 0 d) -1 ​

Answer 1

Answer:

sin theta + cos theta= 1

Here theta= 90° or 0°

If theta =90° then sin2 theta=sin 180°=0

If theta = 0° then sin2 theta=sin0°=0

hence c)0 is the correct option