`tan^2 (pi/16) + tan^2 ((2pi)/16) + tan^2((3pi)/16).........+tan^2((7pi)/16/)=35`

tan^(2)((pi)/(16))+tan^(2)((2 pi)/(16))+tan^(2)((3 pi)/(16))... ..+tan^(2)((7 pi)/(16)/)=35

Find the exact value of tan^(2)((pi)/(16))+tan^(2)((3 pi)/(16))+tan^(2)((5 pi)/(16))+tan^(2)((7 pi)/(16))

Prove that, tan^(2) (pi/6) cdot tan^(2)(2pi/16) cdot tan^(2) (3pi/16) cdot tan^(2) (4pi/16) cdot tan^(2) (5pi/16) cdot tan^(2) (6pi/16) cdot tan^(2)(7pi/16) = 1 .

Find the value of sin^2(pi/16)+ sin^2 ((3pi)/16)+sin^2 ((5pi)/16)+sin^2((7pi)/16) .

Find the value and tan (pi/16) tan ((3pi)/16) tan((5pi)/16)tan((7pi)/16) .

Evaluate : tan ""(pi )/(12) .tan ""( pi )/(16) .tan ""(5pi )/(12) .tan ""( 7pi )/(16)

S.T cot.(pi)/(16).cot.(2pi)/(16).cot.(3pi)/(16).....cot.(7pi)/(16)=1

tan. (pi)/(10) + tan. (3pi)/(10) + tan. (7pi)/(10) + tan. (9pi)/(10) =

Prove that "tan"(pi)/(12) "tan"(pi)/(16) "tan"(5pi)/(12)"tan"(7pi)/(16)=1

Fill in the blanks : "tan"(pi)/(16) "tan"(3pi)/(16)"tan"(5pi)/(16)"tan"(7pi)/(16)= _________ .