" 3."cos^(-1)tan(-(5 pi)/(4))

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

Find the principal value of each of the following :cos^(-1)((sin(4 pi))/(3))( ii) cos^(-1)((tan(3 pi))/(4))

Find the principal value of each of the following: (i) cos^(-1)(sin((4pi)/3)) (ii) cos^(-1)(tan((3pi)/4))

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

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

COS (tan ^ (-1) (3) / (4)); cos ^ (-1) (cos5 (pi) / (4))

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

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 ]

tan((pi)/4+1/2"cos"^(-1)a/b)+tan((pi)/4-1/2"cos"^(-1)a/b)=

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