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Iteru [2.4K]
3 years ago
10

What is trigonometry?

Mathematics
2 answers:
Gala2k [10]3 years ago
8 0

Trigonometry is greek for <em>triangle measurement</em>.

Three of the most basic ideas in trigonometry are the <em>sine</em>, <em>cosine</em>, and <em>tangent ratios</em>. The sine, cosine, and tangent ratios can be defined as follows.

I have attached right triangle ABC in the image attached.

In right triangle ABC, the sine of angle A is equal to the ratio of the length of the side opposite angle A to the length of the hypotenuse. So in right triangle ABC, the sine of angle A equals y over z. The abbreviation we use for sine is <u>sin</u>.

Next, the cosine of angle A is equal to the ratio of the length of the side adjacent to angle A to the length of the hypotenuse. So in right triangle ABC, the cosine of angle A equals x over z. The abbreviation we use for cosine is <u>cos</u>.

Finally, the tangent of angle A is equal to the ratio of the length of the side opposite angle A to the length of the side adjacent to angle A. So in right triangle ABC, the tangent of angle A equals y over x. The abbreviation we use for tangent is <u>tan</u>.

An easy way to remember the sine, cosine, and tangent ratios is to use the word SOH-CAH-TOA.

<em>Sine is opposite over hypotenuse, cosine is adjacent over hypotenuse, and tangent is opposite over adjacent.</em>

dusya [7]3 years ago
5 0

Trigonometry is the study of traingles. It is the geometry of traingles only, where you learn about sines, cosines, and tangents. It comes in high school. Hope this helps :)

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