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Prove that cos^(-1).(4)/(5) + cos^(-1).(...

Prove that `cos^(-1).(4)/(5) + cos^(-1).(12)/(13) = cos^(-1).(33)/(65)`

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show that cos^(-1)""((4)/(5))+ cos^(-1) ((12)/(13)) =cos^(-1) ""((33)/(65))

sin ^(-1) (3)/(5)+cos ^(-1) (12)/(13)=

cos^(-1).(2)/(sqrt(5)) + tan^(-1).(1)/(3) =

sin((1)/(2)"cos"^(-1)(4)/(5))=

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

tan [sin ^(-1)((3)/(5))-cos ^(-1)(-(4)/(5))]=

The value of tan (cos ^(-1) (4)/(5)+tan ^(-1) (2)/(3)) is

The value of cos(sin^(-1).(pi)/(3)+cos^(-1).(pi)/(3)) is

cos[2 sin^(-1) 3/4 + cos^(-1)3/4]