# Precalculus : Law of Cosines and Sines

## Example Questions

### Example Question #21 : Law Of Cosines And Sines

Find the length of the missing side, .

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #22 : Law Of Cosines And Sines

Find the length of the missing side, .

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #64 : Trigonometric Applications

Find the length of the missing side,

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #65 : Trigonometric Applications

Find the length of the missing side,

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #61 : Trigonometric Applications

Find the length of the missing side, .

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #67 : Trigonometric Applications

Find the length of the missing side, .

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #68 : Trigonometric Applications

Find the length of the missing side,

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #69 : Trigonometric Applications

Find the length of the missing side, .

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #70 : Trigonometric Applications

Find the length of the missing side,

Explanation:

First, use the Law of Sines to find the measurement of angle

Recall that all the angles in a triangle need to add up to  degrees.

Now, use the Law of Sines again to find the length of .

### Example Question #21 : Law Of Cosines And Sines

Find the length of the missing side, .