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Hi,

I can't seem to prove the following trig identity, or where to start. Any ideas?

Thanks!

TrigIdentity.jpg

I can't seem to prove the following trig identity, or where to start. Any ideas?

Thanks!

TrigIdentity.jpg

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That is not true, nor one of the steps.

You have to methodically transform the Left-Hand-Side of the equation until it matches the right.

Half of the first step is to replace

I mean to say that

(cos/1)/(1+(sin/cos)) where the 1's and the cos cancel out left with sinx for the first part, right?

One of them will be cos / (1 + sin/cos) The other will be similar.

But there is nothing to cancel out yet.

The two terms have to simplified [ Step 2]

Then combined [ Step 3]

At this point, you will be able to factor and cancel [ Step 4]

How do you simplify that?

If the term were

The only trig you need to know is that

The rest is simple algebra.

The way to solve this is to assume that it is solvable and plug away. It is really a 60 second problem.

The first term becomes

To simplify this you have to eliminate the fraction in the denominator (bottom).

You can multiply this term by

You have to do something similar to the second term.

That will complete [ Step 2]

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tanandcotwith theirsinandcosequivalents.This should be a four line proof.