Question

18. Find the value of sin2 10° + sin 2 80°:
(A) O
(B) 1
(C) 2
(D) 3​

Answer 1

sin^2 theta= cos^2(90-theta)

sin^2 10° = cos^2 80°

now,

sin^2 theta+ cos^2 theta = 1

so,

The answer is 1