" 1."cos^(-1)(cos(13 pi)/(6))quad " 2."tan^(-1)

cos^(-1)(cos(13pi/6))

cos^(-1)(cos""(13pi)/6)=pi/4 .

Find the value of : (1) sin^(-1)(sin.(5pi)/(6)) (2) cos^(-1)(cos.(13pi)/(6)) (3) tan^(-1)(tan.(7pi)/(6))

cos^-1 (cos 13 pi/6) is :

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 ]

Value of cos^(-1) cos(13pi)/(6) is

Find the value of: i) sin ^(-1)(sin (3pi)/5) , ii) cos^(-1)(cos(13pi)/6) , iii) tan^(-1)(tan (7pi)/6) .

Evaluate each of the following: cos^(-1)((cos(13 pi))/(6))( ii) cos^(-1)(cos3)( iii) cos^(-1)(cos4)