Originally Posted by

**sqleung** Hello. I'm currently having problems on trying to find the intersection point of these two trig graphs:

**a(t) = -175cos(0.23t) - 75**

**b(t) = 172sin(0.23t) - 80**

*0 ≤ t ≤ 30*

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Well, I assume this would be the first step:

**-175cos(0.23t) - 75 = 172sin(0.23t) - 80**

Now, I am finding it difficult to do the rest.

Looks like simple algebra to get the t by itself but it's proving to be harder than I anticipated.

I know the answers (using my graphics calculator to find the points) and they are:

(10.12,45.1) and (23.95,-200.19)

Any help is of course, appreciated.

Thankyou.