" 1.) Tan "((13 pi)/(6))

The absolute value of the expression tan((pi)/(16))+tan((5 pi)/(16))+tan((9 pi)/(16))+tan((13 pi)/(16))

Show that sin ^ (- 1) ((sin (3 pi)) / (7)) + cos ^ (- 1) ((cos (46 pi)) / (7)) + tan ^ (- 1) (- (tan (13 pi)) / (8)) + cot ^ (- 1) (cot (- (19 pi) / (8))) = (13 pi) / (7)

Find the value of tan^(-1) (-tan((13pi)/(8)))+ cot^(-1) (-cot((19pi)/(8)))

prod_ (n = 1) ^ (6) (1 + tan ((n pi) / (16))) (1 + tan (((3ln + 4) pi) / (16)))

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

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 ]

Evaluate: tan^(-1)((tan(5 pi))/(6))+cos^(-1){cos((13 pi)/(6))}

Find the value of "tan"^(-1)("tan"(5pi)/(6))+"cos"^(-1)("cos"(13pi)/(6)) .

Find the value of tan^(-1) (-tan.(13pi)/(8)) + cot^(-1) (-cot((19pi)/(8)))