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(2\ tan^(-1)1/7)=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)) .

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)

Which of the following is/are correct? tan[cos^(-1)(4)/(5)+tan^(-1)(2)/(3)]=(17)/(6)cos[tan^(-1)(1)/(3)+tan^(-1)(1)/(2)]=(1)/(sqrt(2))cos2tan^(-1)((1)/(3))+cos(tan^(-1)2sqrt(2))=(14)/(15)cos[2cos^(-1)(1)/(5)+sin^(-1)(1)/(5)]=-(2sqrt(6))/(6)

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))