1.

It tan θ = 1, then cos θ will be :(A) 1(B) 1/2(C) √3/2(D) 1/√2

Answer»

Answer is (D) 1/√2

tan θ = 1

⇒ tan θ = tan 45°

∴ θ = 45°

cos 45° = 1/√2



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