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" (ivi) "tan(2tan pi(1)/(5))...

" (ivi) "tan(2tan pi(1)/(5))

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Find the value of tan(2tan^(-1)((1)/(5))-(pi)/(4))

Evaluate: (i) tan{2tan^(-1)(1/5)-pi/4} (ii) tan{1/2cos^(-1)(sqrt(5)/3)}

Prove: (ii) tan ((pi)/12) tan ((5 pi)/12) tan ((7 pi)/12) tan ((11 pi)/12) = 1

The value of "tan"(pi)/(5) +2"tan"(2pi)/(5)+4"cot"(4pi)/(5) is

tan^(-1)("tan"(7pi)/(5))

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The value of tan (2 tan^(-1). (1)/(5) - (pi)/(4) ) is equal to

Evaluate: i) tan{1/2cos^(-1)sqrt(5)/3} , ii) tan{2tan^(-1)1/5-pi/4}