1.

If a = tan^ (-1)x , then the value of sin 2a= ?

Answer»

Answer:

2x/1+x^2

Explanation:

TAN^(-1)a=x

then tana=x

therefore sin a=x/√1+x^2 and cos a=1/√1+x^2

and hence sin 2A= 2SINA COSA= 2x/1+x^2



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