cos((1)/(2)cos^(-1)(3)/(5))

Write the value of cos^(2)((1)/(2)cos^(-1)(3)/(5))

Write the value of cos^2(1/2cos^(-1)(3/5))

1.What is the value of tan[(1)/(2)cos^(-1)((3)/(5))]+tan[(1)/(2)cos^(-1)((4)/(5))] ?

Number of solutions of the equation 2cot^(-1)2+cos^(-1)((3)/(5))=cos ec^(-1)x is-

Write the value of cos^2(1/2cos^(-1)3/5)

cos^(-1)((3)/(5))+cos^(-1)((4)/(5))=(pi)/(2)

cos^(-1)((3)/(5))+cos^(-1)((4)/(5))=

The value of cos[(1)/(2)cos^(-1)cos((14 pi)/(5))]is(a)cos((2 pi)/(5))(b)cos(-(7 pi)/(5))(c)sin((pi)/(10))(d)-cos((3 pi)/(5))

cos[2cos^(-1)((1)/(5))+sin^(-1)((1)/(5))] =

Prove that cos^(-1)((3)/(5))+cos^(-1)((12)/(13))+cos^(-1)((63)/(65))=(pi)/(2)