Math Homework Help - Tagged with trigonometric identities

if `y = 3x sqrt (1-x^2)(cos^(-1)(x))+2x^3+(cos^(-1)(x))^2` show that `dy/dx=3x(2x-1)+((1-6x^2)cos^(-1)(x))/sqrt(1-x^2)`  

Posted by jacqueshaw April 17, 2013 at 6:34 PM via web. 1 educator answer. »

Prove the trigonometric identity: tan^2 x - sin^2 x = tan^2 sin^2 x

Posted by juneebugg17 March 28, 2013 at 1:02 PM via web. 1 educator answer. »

Prove the identity sin(2x)/sin(x) - cos(2x)/cos(x)= sec x Can you explain steps please I'm having a hard time understanding this. Thanks in...

Posted by cinmin February 17, 2013 at 2:33 AM via web. 1 educator answer. »

prove that `2/(1-costheta) = (2sectheta)/(sectheta-1)`

Posted by user3155520 February 12, 2013 at 11:58 AM via web. 1 educator answer. »

How do I use the subtraction formula for sine to verify the identity of sin(pi/2-x)=cosx?Can you provide steps please? Thank you!

Posted by cinmin February 2, 2013 at 6:27 PM via web. 1 educator answer. »

Prove `tan2x cosec x = sin x / (1-sin 2x).`

Posted by stevesam93 September 11, 2012 at 10:04 AM via web. 1 educator answer. »

Prove the identity:  sin(90-x) / 1+sinx - cosx / 1-sinx = -2tanx

Posted by rplz95 August 8, 2012 at 2:36 AM via web. 1 educator answer. »

Whatre the steps in verifying the identity sin(x-y)/sin y + cos (x-y)/cos y = sinx/(sinycosy) ?

Posted by pbacklund July 24, 2012 at 11:57 PM via web. 1 educator answer. »

Prove that `sec^4(x)-tan^4(x)=1+tan^2(x)` .

Posted by jakeasv July 23, 2012 at 1:05 PM via web. 2 educator answers. »

Prove that `cos(pi/7)*cos(2pi/7)*cos(4pi/7)= -1/8`

Posted by lochana2500 July 7, 2012 at 1:11 PM via web. 1 educator answer. »