1.

What is the value of (tanθ cosecθ)2 -(sinθ secθ)2(a) -1(b) 0(c) 1(d) 2

Answer»

Correct answer is: (c) 1

(tanθcosecθ)2 -(sinθsecθ)2

=tan2θcosec2θ-sin2θsec2θ

=(sin2θ/cos2θ)x1/ sin2θ - sin2θx1/cos2θ

=(1- sin2Ɵ)/ cos2Ɵ= cos2Ɵ/ cos2Ɵ =1



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