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vaieri [72.5K]
3 years ago
12

If 3 tan θ = 1, then find the value of sin2 θ – cos2 θ.

Mathematics
1 answer:
vfiekz [6]3 years ago
4 0

Answer:

sin2θ - cos2θ = 2sin² θ

Step-by-step explanation:

hello :

tan θ = 1    means : sinθ /cosθ   so : sinθ =cosθ

sin2θ = 2sin θ  cosθ  =2sin² θ

cos2θ = cos²θ - sin²θ = sin²θ - sin²θ =0

sin2θ - cos2θ = 2sin² θ

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