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" zulati "521:cos(2tan^(-1)(1)/(7))=sin(...

" zulati "521:cos(2tan^(-1)(1)/(7))=sin(4tan^(-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)))

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

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) .

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)) .