Evaluate the following
`tan^(-1) { cot (- 1/4)}`

Evaluate the following: cot^(-1)(cot4)

tan^(-1)(cot4x)

Find the value of the following: cot (tan^-1 a + cot^-1 a)

Evaluate the following : (tan35^(@))/(cot55^(@))+(cot78^(@))/(tan12^(@))-1

Evaluate the following (i) sin ( cosec ^(-1) 5/3)" "(ii) cot ( tan^(-1). 3/4)

Evaluate the following (i) sin ( cosec ^(-1) 5/3)" "(ii) cot ( tan^(-1). 3/4)

Evaluate the following (i) sin ( cosec ^(-1) 5/3)" "(ii) cot ( tan^(-1). 3/4)

Evaluate the following (i) sin ( cosec ^(-1) 5/3)" "(ii) cot ( tan^(-1). 3/4)

Evaluate each of the following: tan(csc^(-1)(13)/(5))( ii) tan((sec^(-1)(13))/(12)) (iii) tan((cot^(-1)8)/(15))