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" (i) Show that "cos(2tan^(-1)(1)/(7))=s...

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

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

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

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

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

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

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

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

If a=cos (2.tan^(-1).(1)/(7))and b = sin (4.tan^(-1).(1)/(3))

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