Question

find the value of sin square theta + cos square theta equal to 30 degree and 60 degree​

Answer 1

☛ sin² θ + cos² θ

θ = 30° ; θ = 60° respectively.

So,

➜ sin² 30° + cos² 60°

➜ cos² ( 90° - 30° ) + cos² 60° { •°• sin θ = cos (90 - θ) }

➜ cos² 60° + cos² 60°

➜ 2 cos² 60°

➜ 2 × (1/2)²

➜ 2 × 1/4

➜ 1/2

Hence, Your answer is 1/2