# If #sin A = 1/3# and 0< A < 90, then what is cos A?

##### 2 Answers

Jun 4, 2018

See below

#### Explanation:

If

Then using

Then

But if 0< A< 90, then the cosine is positive and

Jun 4, 2018

#### Explanation:

Since

Consider the right

We are told that

Applying Pythagoras

Now,