Sine, Cosine, and Tangent Functions

Values of Sin-Cos-Tan 

Sine, Cosine and Tangent are all based on a Right-Angled Triangle.

• "Opposite" is opposite to the angle θ
• "Adjacent" is adjacent (next to) to the angle θ
• "Hypotenuse" is the long one

Adjacent is always next to the angle

And Opposite is opposite the angle

For a triangle with an angle θ, they are calculated this way:

Sine Function:	sin(θ) = Opposite / Hypotenuse
Cosine Function:	cos(θ) = Adjacent / Hypotenuse
Tangent Function:	tan(θ) = Opposite / Adjacent

In picture form:

How to remember? Think "Sohcahtoa"! It works like this:

Soh...	Sine = Opposite / Hypotenuse
...cah...	Cosine = Adjacent / Hypotenuse
...toa	Tangent = Opposite / Adjacent