Prove these identities
(i) secx cosecx - cotx = tanx

In step A, you replace all trigonometric functions with their definitions in terms of sine and cosine.

In step B, you add the two together as you add fractions.

In step C, you replace 1 with the sum of the squares of sine and cosine.
In step D, you add the cosine terms together so they disappear.

In step E, finally, you divide numerator and denominator by .

ab will be equal to

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3