Question

How can you remember how to use cosinem sine, and tangent?

Answer 1

We can remember sine, cosine and tangent by knowing the acronym
SOHCAHTOA.

SOH = sine is opposite over hypotenuse

CAH = cosine is adjacent over hypotenuse

TOA = tangent is opposite over adjacent

You need to also know the properties of a right triangle.

Long side = hypotenuse

There are two legs:

1. Opposite side

2. Adjacent side

Answer 2

Sine, Cosine and Tangent. And Sine, Cosine and Tangent are the three main functions in trigonometry. They are often shortened to sin, cos and tan. The calculation is simply one side of a right angled triangle divided by another side ... we just have to know which sides, and that is where "sohcahtoa" helps. :)