# Question #a6b93

##### 1 Answer

Mar 31, 2017

#### Explanation:

There are two possibilities here, that

**Case 1:**

Knowing special angles,

**Case 2:**

Knowing special angles,

Therefore

Mar 31, 2017

There are two possibilities here, that

**Case 1:**

Knowing special angles,

**Case 2:**

Knowing special angles,

Therefore