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help triangle trigonometry.

0 votes

asked Jan 26, 2015 in TRIGONOMETRY by anonymous

4 Answers

0 votes

1)

Step 1:

Find .

The angles of the triangle are .

One side of the triangle is .

The third angle in a triangle is

Use the law of sine rule :.

Consider .

Substitute image in above sine rule,

image

image

Solution :

image

answered Feb 10, 2015 by yamin_math Mentor
0 votes

2)

Step 1:

 Find .

The angles of the triangle are .

One side of the triangle is .

Consider .

Substitute image in above sine rule,

Solution :

answered Feb 10, 2015 by yamin_math Mentor
0 votes

3)

Step 1:

Find image.

One angle of the triangle is  image.

The triangle sides are image.

Use the law of cosine rule : image.

Substitute image in above cosine rule,

image

image

Solution :

image

answered Feb 10, 2015 by yamin_math Mentor
0 votes

4)

Step 1:

Find image.

One angle of the triangle is  image.

The triangle sides are image.

Use the law of cosine rule : image.

Substitute image in above cosine rule,

image

image

Solution :

image

answered Feb 10, 2015 by yamin_math Mentor

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