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Question

Answer 1

Step 1:

(1)

The angles of the triangle are and .

The side of the triangle is .

Property of triangle : Sum of all angles in a triangle is .

Find .

Sine law : .

Step 2:

(2)

The angles of the triangle are and .

The side of the triangle is .

Property of triangle : Sum of all angles in a triangle is .

Find .

Sine law : .

Solutions:

(1) .

(2) .

Answer 2

Step 1:

(3)

The angle of the triangle is .

The sides of the triangle are and .

Find .

Cosine law : .

Step 2:

(4)

The angle of the triangle is .

The sides of the triangle are and .

Find .

Cosine law : .

Solutions:

(3) .

(4) .