a-tan^(4)A=1+2tan^(2)A

(tan4A+tan2A)(1-tan^(2)3A tan^(2)A)=2tan3A sec^(2)A

Prove that : sec^(4)theta-tan^(4)theta=1+2tan^(2)theta

Prove that : sec^(4)theta-tan^(4)theta=1+2tan^(2)theta

If =int(tan^(5)dx=Atan^(4)x-1/2tan^(2)x+B"ln"|secx|+C) then

If =int(tan^(5)dx=Atan^(4)x-1/2tan^(2)x+B"ln"|secx|+C) then

Prove that (tan^(2)A-1)/(tan^(4)A-1)=cos^(2)A

Sum the series, 'n' terms tan^(-1) 2/4 +tan^(-1) 2/9+tan^(-1) 2/16+ tan^(-1) 2/25+.... to 'n' terms. Also show that S_(n)=tan^(-1)3

Pove that i) tan^(-1)1/2+tan^(-1)2/11=tan^(-1)3/4 ii) tan^(-1)2/11+tan^(-1)7/24=tan^(-1)1/2 iii) tan^(-1)1+tan^(-1)1/2+tan^(-1)1/3=pi/2 iv) 2tan^(-1)1/3+tan^(-1)/17=pi/4 v) tan^(-1)2-tan^(-1)1=tan^(-1)1/3 vi) tan^(-1)+tan^(-1)2+tan^(-1)3=pi vii) tan^(-1)1/2+tan^(-1)1/5+tan^(-1)1/8=pi/4 viii) tan^(-1)1/4+tan^(-1)2/9=1/2tan^(-1)4/3

Evaluate 2tan^(-1)(1/2)+tan^(-1)(1/4)

Evaluate 2tan^(-1)(1/2)+tan^(-1)(1/4)