Question

If sin A=3/5 then cot 2 A=?... Actually I can find the value of cot A but I don't understand what I'll have to do for cot 2 A. Do I need to multiply the value of A by 2?

Answer 1

you write cot 2A=1/tan2A
now you know tan2A =2tanA/1-tan^2A
now sinA=3/5 so, tanA=3/4
put value , tan2A=24/7
so, cot2A=7/24

Answer 2

Step-by-step explanation:

its correct...

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