Angle Measures
Change degrees to radians
pi/180
What is arc length?
s=r (theta)
What does the s stand for in SOH
Sine
Reference angles are always....
positive
What is the amplitude of Sine parent graph
1
Change radians to degrees
180/pi
What is area of sectors?
What does H stand for in CAH
hypotenuse
Law of Sines is
Sine A/a
Sine B/b
Since C/c
undefined
Degrees to Degree- Minute-Second (DMS)
multiply by 60
What is linear speed
v=s/time or v=arc length/time
What does a stand for in CAH
adjacent
Law of Cosines is
a^2=b^2+c^2-2(bc)COSA
Same of b and c
What is the amplitude of Cos parent
1
DMS to Degrees
Divide by 60 or 360
What is angular speed?
w= theta/time
if you have an opposite side and hypotenuse what trig function should you use?
Sine
Huron's formula is
Square root of S(S-a)(S-b)(S-c)
What is the Sine Parent period or frequency?
2pi
What is 90 degrees in radians
pi/2
if a CD rotates at 237 revolutions per minute what is W?
w=2pi(237)/min or
w=1489.1 rad/min
In the unit circle what trig function is x and y
cosine, sine
What is the formula for semi perimeter?
1/2(a+b+c)
Area of triangles
A=1/2ab(SinC)