" (1) "cos[tan^(-1)((3)/(4))]

Evaluate: (i) tan {cos^(-1)(-(7)/(25))}_( (ii) )csc{cot^(-1)(-(12)/(5))}cos{tan^(-1)(-(3)/(4))}

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

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

Evaluate (ii) cos{tan^(-1) (3/4)}

Evaluate: i) sin(cos^(-1)(3/5)) , ii) cos(tan^(-1)(3/4))

Evaluate each of the following: cos((cos^(-1)5)/(13))( ii) cos((sin^(-1)8)/(17))( iii) cos((tan^(-1)3)/(4))

Prove that. tan^(-1)((1)/(4)) +tan^(-1)((2)/(9)) =(1)/(2) cos^(-1) ((3)/(5)) .

Evaluate "cos"("tan"^(-1)3/(4))

Evaluate: (i) tan{cos^(-1)(-7/(25))} (ii) "c o s e c"{cot^(-1)(-(12)/5)} cos{tan^(-1)(-3/4)}

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