click below
click below
Normal Size Small Size show me how
IrishMath Ch 13 Trig
Chapter 13 Trig Flashcards
Question | Answer |
---|---|
sin x | opp/hyp |
cos x | adj/hyp |
tan x | opp/adj |
hypotenuse | longest side of right triangle |
adjacent leg | leg that touches angle (helps form the angle) |
opposite leg | leg that is across from angle and doesn't help form angle |
sec x | hyp/adj |
csc x | hyp/opp |
cot x | adj/opp |
0 degrees = ____ radians | 0 degrees = 0 radians |
180 degrees = _____ radians | 180 degrees = Pi radians |
90 degrees = _____ radians | 90 degrees = Pi/2 radians |
270 degrees = _____ radians | 270 degrees = 3Pi/2 radians |
To convert from degrees to radians, multiply by: | Pi radians / 180 degrees |
To convert from radians to degrees, multiply by: | 180 degrees / Pi radians |
Arc Length of Sector of Circle | S = r theta (theta is in radians) |
Area of Sector of Circle | A = 1/2 r^2 theta (theta is in radians) |
On the x-y coordinate plane: sin A = | y/r |
On the x-y coordinate plane: cos A = | x/r |
On the x-y coordinate plane: tan A = | y/x |