Basic Trig Knowledge
What mnemonic device do we use to help us remember our trig ratios?
SOH-CAH-TOA
Find csc(x) if sin(x) = 4/5
5/4
Solve: tan(65) = x/7
15.012
Solve for x if sin(x) = 3/4
48.59
What ratio represents sine? (Answer in terms of opposite, adjacent, and hypotenuse)
opposite / hypotenuse
Find cos(x) if tan(x) = 12/5
5/13
Solve: cos(60) = x/8
4
Solve for x if cos(x) = 5/13
67.38
What ratio represents cosine? (Answer in terms of opposite, adjacent, and hypotenuse)
adjacent / hypotenuse
Find tan(x) if sin(x) = 4/5
4/3
sin(7) = x/3
55.008
What ratio represents tangent? (Answer in terms of opposite, adjacent, and hypotenuse)
Find sec(x) if tan(x) = 3/4
5/4
cos(30) = 4/x
4.619
Solve for x if sin(x) = .5
30
What type of triangles do our trigonometric ratios work on? (Hint: it is one of the four classifications of triangles by angle.)
Right triangles
Find tan(x) if sin(x) = 4/7
Exact answers only - no decimals!
sqrt33/4
sin(27) = 12/x
26.432
Solve for x if cos(x) = 2
Undefined!