Prove that the following identity is true:
1 + cos x/1 - cos x=csc x + cot x
prove that the following identities is true:
1 + cot^3 t/1 + cot t=csc^2 t - cot t
Find all solutions if 0 < x< 2pie. Use exact values only.
cos 2x cos x - sin 2x sin x =1/(square root of 2)