1.

Prove that:`2sin^(-1)(3/5)=tan^(-1)((24)/7)`

Answer» We have =`2 sin^(-1)(3/5)`
=`2 tan^(-1)(3/4)`
=`tan^(-1)(3/4)+tan^(-1)(3/4)`
=`tan^(-1)(((3/4)+(3/4))/(1-(3/4)(3/4)))`
=`tan^(-1)((24/16)/(7/16))`
=`tan^(-1)(24/7)`
hence proved


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