Question

prove that Cot-tan=2cos²-1/sin.cos
​

Answer 1

refer to the attachment

Answer 2

Step-by-step explanation:

Answer

Now,

cotθ−tanθ

=

sinθ

cosθ

−

cosθ

sinθ

=

cosθ.sinθ

cos

2

θ−sin

2

θ

=

sinθ.cosθ

2cos

2

θ−1

. [Since 1−sin

2

θ=cos

2

θ]

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