# Given #cos(x) = -3/-7# and #pi/2 < x < pi#, how do you find #cos(x/2)#?

##### 2 Answers

#### Answer:

#### Explanation:

The domain was originally

Therefore,

So,

If

Additional examples:

If

If

Jul 27, 2018

The domain was originally

Therefore,

Jul 27, 2018

So,

If

Additional examples:

If

If