Conversions between Radians and Degrees
120 degrees to______Radians
2pi/3
sin (-A)=-sin A
Opposite-Angle Identities
sin 180 =
0
tan x=1/2 find cos x
cos x = 2/5
cos x = 2/5 find x
x = 60
180 degrees to _______Radians
pi
cos x = 1/ sec x
Reciprocal Identities
tan 270 =
Undefined
sin x =2/4 find csc x
csc x = 4/2
sin x = 1/2 find x
x = 30
90 degrees to _____Radians
pi/2
cosx /sinx =cotx
quotient Identities
cos 120 =
-1/2
cot x = 4/3 find sin x
sin x = 4/5
tan x = 3/4 find x
x = 90
270 degrees to ______Radians
3pi/2
tan2x+1 sec2x
Pythagorean Identities
sin 360 =
0
cot x = 4/3 find sin x
sin x = 4/5
sin x = 3/5 find x
x = 30
360 degrees to ______radians
2pi
sin x/2 =+- square root (1-cosx/2)
Half-Angle Identities
cos 180
-1
sec x =6/5 find cos x
cos x = 5/6
cos x = 1/2 find x
x = 60