Evaluate :(sinΘ+cosΘ)²+(cosΘ-sinΘ)²
Answers
Answered by
7
(sin θ + cos θ)² + (cos θ - sin θ)²
sin² θ + cos² θ + 2sinθ cos θ + cos² θ + sin² θ - 2sin θ cosθ
2(sin² θ + cos²θ)
2(1)
2
Answered by
0
Answer
= (sinθ + cosθ)² + (sinθ - cosθ)²
= sin²θ + cos²θ + 2 sinθ cosθ + sin²θ + cos²θ - 2 sinθ cosθ
= 1 + 1 , since sin²θ + cos²θ = 1
= 2
#MarkAsBrainliest
Step-by-step explanation:
Similar questions