Prove that cotA-tanA=2cot2A

Steps to prove cotA-tanA=2cot2A

Take L.H.S cotA-tanA

= cotA-tanA

= cotA-1/cotA

= cot^2A-1/cotA

= 2 cot^2A-1/ 2cotA

= 2cot2A

= R.H.S

Detailed Information:

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