cot^(-1)9+cosec^(-1)sqrt((41)/(4))=pi/4

prove the following cot^(-1)9+cosec^(-1)frac(sqrt41)(4)=pi/4

The value of cot^(-1)9+"cos ec"^(-1)((sqrt(41))/(4)) , is equal to

cot^(-1)3+cosec^(-1)sqrt(5)=

Prove statement "cot"^(-1) 9 + "cosec"^(-1) sqrt41/4 =pi/4

4(cot ^(-1)3+"cosec"^(-1) sqrt(5))=pi

Prove that : (i) tan^(-1) x + cot^(-1)( x+1) = tan^(-1) (x^(2)+x+1) (ii) cot^(-1) 3 + "cosec"^(-1) sqrt(5) = pi/4

Show that: 4(cot^(-1)(3/2)+cosec^(-1)sqrt(26))=pi .