Neal D. answered • 09/08/16

Tutor

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Education Made Understandable

**You are ready to finish the proof**.

As long as you do things that are

algebraically correct you can't mess up the problem.

Just try to make one side look like the other side.

Only work on one side for a while.

**Now you have on the left side:**

(sec

^{2}X - 1) sin^{2}X= sec

^{2}X sin^{2}X - sin^{2}X= (1/cos

^{2}X) sin^{2}X - sin^{2}X= (sin

^{2}X/cos^{2}X) - sin^{2}X= tan

^{2}X - sin^{2}X ; so both sides are equalOften times just keep on working the equation until

you see something familiar or you run into a deadend

Uladzimir H.

09/08/16