Midterm Review Flashcards
Formulas for linear speed?
Convert to DMS, -345.12
D= -345, M= (12*60) = 7.20 S= (.20*60)= 12
Arc length, area of a sector, angular speed, linear speed?
MUST BE IN RADIANS ALWAYS!!!!
RPM?
make sure to convert to what its asking you, miles to feet.
Angular speed is always in ______
Radians per minute.
When doing area of a sector, the radius is____
the length they give you
Check the calculator to make sure it is in
radians or degrees!
Unit Circle, 30 degrees equals?
(radical 3/2, 1/2)
The shadow in a word problem is at the ______
BOTTOM
Reference Angle?
When finding a reference angle for a radian, the denominator must be equal on all 4 points (pi half, pi, 2pi, 3pi/2). This dtermines between which quadrant it is in. Then you subtract from the closest x axis!
When doing the radical of 2 numbers, just
leave it like that
Period =
amount of time it takes to complete one cycle
period=
2pi/b or 2pi/w
formula for harmonic motion?
asinwt or acoswt
frequency is the
reciprocal of the period!
When doing a bearing, you
make a compass at every degrees turn, and move clockwise from NORTH.
SSA has
2 possible solutions
When solving for another triangle…
you keep everything it gives you but change the top angle by subtracting it from 180, then check if it makes sense.
When the graphs of a function are negative,
you change the max to min and the min to max
Why is the tangent graph different?
the y values are UND, -a, int, a, UND
the cotangent graph simply changes the a signs.
Also, in tangent and cotangent, the period is pi/b, not 2pi/b.
csc graph
Sec graph
