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Mathematics 13 Online
OpenStudy (anonymous):

Help please!

OpenStudy (anonymous):

OpenStudy (mathstudent55):

I'll explain it to you. Follow along and answer my questions.

OpenStudy (anonymous):

Ok

OpenStudy (mathstudent55):

This is a problem that uses trigonometry. You need to know about the sine, cosine and tangent. I assume you are studying these concepts, right?

OpenStudy (anonymous):

Yeh but they arent making any sense in my head

OpenStudy (anonymous):

Yeah

OpenStudy (mathstudent55):

That's what we're here for. To help it make sense.

OpenStudy (mathstudent55):

The sine, cosine, and tangent are ratios of the lengths of the sides of a right triangle.

OpenStudy (anonymous):

Ok

OpenStudy (mathstudent55):

You clearly have a right tringle since you show in your picture that the lower angle to the right is a right angle.

OpenStudy (anonymous):

Yes

OpenStudy (mathstudent55):

When you have a right angle in a triangle, the other two angles must be acute angles.

OpenStudy (anonymous):

Ok

OpenStudy (mathstudent55):

Let's look at your specific problem. I'll redraw it, so I can make comments on it.

OpenStudy (anonymous):

Ok

OpenStudy (mathstudent55):

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OpenStudy (mathstudent55):

For each of the two acute angles of the right triangle, there are names given to the sides of the triangle. Since I am helping you with your problem, let's look at the names you'd give the sides for your specific problem.

OpenStudy (anonymous):

Ok

OpenStudy (mathstudent55):

The side opposite the right angle is always called the hypotenuse.

OpenStudy (anonymous):

I know.

OpenStudy (mathstudent55):

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OpenStudy (mathstudent55):

Great. There are two other sides. They are the sides that form the right angle. These two sides are called legs. One leg measures 12 cm, and the other leg measures x, which we will figure out soon.

OpenStudy (anonymous):

Ok

OpenStudy (mathstudent55):

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