Post on 04-Jan-2016
transcript
We will be learning 3 trig ratios
Sine- Abbreviation is Sin (but you pronounce it Sign, not Sin!!!)
Cosine- Abbreviation is Cos
Tangent- Abbreviation is Tan
Adjacent
OppositeTan
hypotenuse
AdjacentCos
hypotenuse
oppositeSin
The Trigonometric Ratios(The SOHCAHTOA model)
Find the value of each of the trigonometric functions of the angle
Adjacent
12 13
c = Hypotenuse = 13
b = Opposite = 12
In order to use your calculator to find trigonometric ratios, it MUST be in degree mode!!!!
Hint: Before taking ANY test that might have trig on it, change the mode to Degree to be safe (EOC, ACT, Semester Exam…)
Solving a Problem withthe Tangent Ratio
60º
53 ft
h = ?
We know the angle and the We know the angle and the side adjacent to 60º. We want to side adjacent to 60º. We want to know the opposite side. Use theknow the opposite side. Use thetangent ratio:tangent ratio:
ft 92353
531
3
5360tan
h
h
h
adj
opp
1
2 3
Why?