Can someone help me verify identity: sec^2x/cotx-tan^3x=tanx
K Karlos New member Joined Jun 22, 2011 Messages 1 Jun 22, 2011 #1 Can someone help me verify identity: sec^2x/cotx-tan^3x=tanx
R royhaas Full Member Joined Dec 14, 2005 Messages 832 Jun 22, 2011 #2 Start by writing the left hand side in terms of sine and cosine.
tkhunny Moderator Staff member Joined Apr 12, 2005 Messages 11,339 Jun 22, 2011 #3 Please start new threads when posting new problems. You might need this: tan(x) = 1/cot(x) Then this: ab + ac = a(b+c) And one more thing. You tell me what.
Please start new threads when posting new problems. You might need this: tan(x) = 1/cot(x) Then this: ab + ac = a(b+c) And one more thing. You tell me what.
