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Question

Answer 1

Step 1:

1) Find .

The triangle angles are .

One of the triangle side is .

The third angle is

Use the law of sine rule :.

Consider .

Substitute in above rule,

Step 2:

2) Find .

The triangle angles are .

One of the triangle side is .

Consider .

Substitute in above rule,

Step 3:

3) Find .

One of the triangle angle is  .

The triangle sides are .

Use the law of cosine rule : .

Substitute in above rule,

Step 4:

4) Find .

One of the triangle angle is  .

The triangle sides are .

Use the law of cosine rule : .

Substitute in above rule,

Solution :

1)

2)

3)

4)