`cos^(-1) tan(-(5pi)/(4))`

cos^(-1)tan(-(5 pi)/(4))

cos[tan^(-1){tan((15pi)/4)}]

cos[tan^(-1){tan((15pi)/4)}]

tan((pi)/(4)+(1)/(2)cos^(-1)x)+tan((pi)/(4)-(1)/(2)cos^(-1)x),x!=0 is equal to

Simplify (I ) cos ^(-1) ( cos ((13 pi )/(3))) (ii ) tan^(-1) ( tan ((3pi)/(4))) (iii ) sec^(-1) ( sec ((5pi )/(3))) (iv ) sin^(-1) [ sin 10 ]

Let tan^(-1) ( tan. (5pi)/(4))=alpha, tan^(-1) (-tan. (2pi)/(3))=beta , then

Find the value of cos^(-1)(cos((4pi)/(3)))+cos^(-1)(cos((5pi)/(4)))