.

2. 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)

3. 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.

4. name ratio equation

5. Set up ratio using the correct side
lengths.
Reduce if possible.
- OR -
Divide and round your decimal
answer.
*Depends on the directions given.*

6. Find the value of each trig ratio.
sin A =
cos A =
tan A =
sin B =
cos B =
tan B =

7. Find the value of each trig ratio to
the nearest ten-thousandth.
sin R =
cos R =
tan S =