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

sin 2x = 2 sin x cos x


cos 2x = cos2 x - sin2 x
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