`tan(9 0^(@)-cot^(- 1)1/3)=`

The value of tan(tan^(-1)5+"cot"^(-1)(1)/(3)) is :

The value of tan(tan^(-1)5+"cot"^(-1)(1)/(3)) is :

Evaluate : tan[2tan^(-1)(1/2)-cot^(-1)3]

cot(tan^(-1)a+cot^(-1)a)

Prove that: tan^(-1)(1)/(7)+tan^(-1)(1)/(13)=tan^(-1)(2)/(9)tan^(-1)+tan^(-1)(1)/(5)+tan^(-1)(1)/(8)=(pi)/(4)tan^(-1)(3)/(4)+tan^(-1)(3)/(5)-tan^(-1)(8)/(19)=(pi)/(4)tan^(-1)(1)/(5)+tan^(-1)(1)/(7)+tan^(-1)(1)/(3)+tan^(-1)(1)/(8)=(pi)/(4)cot^(-1)7+cot^(-1)8+cot^(-1)18=cot^(-1)(1)/(13)

If cos(tan^(-1)3+cot^(-1)a)=0, then a is equal to

Prove that "Tan"^(-1)2+Tan^(-1)3=Cot^(-1)(1/2)+Cot^(-1)(1/3)=(3pi)/4

The value of cot7(1^0)/2+tan67(1^(@))/2-cot67(1^(@))/2-tan7(1^0)/2 is