Trigonometric ratios are used with

right triangles to solve for

missing angles and/or sides.

The 3 main trig ratios are:

Sine (sin)

Cosine (cos)

Tangent (tan)

Sides are labeled in reference to a

certain angle, often θ (“theta”) or x.

Hypotenuse: the longest side.

Always across from the right angle.

Adjacent: side that is

touching the angle θ.

Opposite: side

across from the

angle θ.

name ratio equation

Set up ratio using the correct side

lengths.

Reduce if possible.

- OR -

Divide and round your decimal

answer.

*Depends on the directions given.*

Find the value of each trig ratio.

sin A =

cos A =

tan A =

sin B =

cos B =

tan B =

Find the value of each trig ratio to

the nearest ten-thousandth.

sin R =

cos R =

tan S =