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Show that : cos(2\ tan^(-1)1/7)=sin(4\ t...

Show that : `cos(2\ tan^(-1)1/7)=sin(4\ tan^(-1)1/3)`

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Show that: cos(2tan^(-1)(1/7))=sin(4tan^(-1)(1/3))

Show that: cos(2tan^(-1)((1)/(7)))=sin(4tan^(-1)((1)/(3)))

Prove that cos(2Tan^(-1)1/7) = sin(4Tan^(-1)1/3)

Show that: cos(2tan^-1(1/7))=sin(4tan^-1(1/3))

Prove that cos(2tan^-1 1/7) = sin ( 4 tan^-1 1/3)

Show that cos(2Tan^(-1).(1)/(7))=sin(2Tan^(-1).(3)/(4))

Show that : cos(2tan^-1frac{1}{7})=sin(4tan^-1frac{1}{3})

Directions (Q. Nos. 16-25) Prove the following "cos"(2"tan"^(-1)1/(7))="sin"(4"tan"^(-1)1/(3)) .

Show that : "tan"^(-1)(1)/(4) +"tan"^(-1)(2)/(9) = (1)/(2) "cos"^(-1)(3)/(5) .