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19 votes
Write the trigonometric expression in terms of sine and cosine, and then simplify. cot()/sin()-csc()

User Robin Curbelo
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2.3k points

1 Answer

5 votes
5 votes

Answer:

First, we know that:

cot(x) = cos(x)/sin(x)

csc(x) = 1/sin(x)

I can't know for sure what is the exact equation, so I will assume two cases.

The first case is if the equation is:


image

if we replace cot(x) and csc(x) we get:


image

Now let's we can rewrite this as:


image


image

We can't simplify it more.

Second case:

If the initial equation was


image

Then if we replace cot(x) and csc(x)


image

This is equal to:


image

And we know that:

sin^2(x) + cos^2(x) = 1

Then:

sin^2(x) - 1 = -cos^2(x)

So we can replace that in our equation:


image

User Ubaier Bhat
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2.4k points