balajishn balajishn

28-03-2020
Mathematics

contestada

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

Respuesta :

ghanami ghanami

28-03-2020

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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