Subject: trigonmetry identites My name is Caitlin and my question is from 11th grade math and I'm a student my question is I need to solve this identity : cos x csc x  sin x sec x = 2 cot 2x Thank you soo much! Hi Caitlin,Replace csc x by 1/sin x and sec x by 1/cos x. Now find a common denominator for the two fractions on the left and add them. At this point you need to use the double angle identities and Paul
