# If #sintheta=3/5#, what is #costheta + cottheta#?

##### 1 Answer

#### Explanation:

If

First, let's remember that

So we know with this triangle that we have a side = 3 and hypotenuse = 5.

There is a special kind of right triangle called the "3, 4, 5 triangle", so called because of the ease in calculating sides using the pythagorean theorem:

And so if we didn't know or remember the "3, 4, 5 triangle", we could find it this way:

With opposite = 3, adjacent = 4, and hypotenuse = 5, we can answer the question.

Ok, so

For Q1:

For Q2: