Random calc (trig identities and unit circle)
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23 Terms
trig identities: what is sec x, csc x, tan x, cot x?
1/cos x, 1/sin x, sin x/cos x, 1/tan x (or cos x/sin x)
(trig identity) sin²x + cos²x = ?
1
(trig identity) sec²x = ?
1 + tan² x
(trig identity) csc²x = ?
1 + cot²x
What is the inverse of ln?
e
What is the point 0 or 2pi on the unit circle equal to? (unit circle practice)
(cos 0, sin 0) = 1, 0
What is the point pi/6 or 230 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = sqrt 3/2, 1/2
What is the point pi/4 or 45 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = sqrt 2/2, sqrt 2/2
What is the point pi/3 or 60 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = 1/2, sqrt 3/2
What is the point pi/2 or 90 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = 0, 1
What is the point 2/3pi or 120 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = -1/2, sqrt 3/2
What is the point 3/4 pi or 135 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = -sqrt 2/2, sqrt 2/2
What is the point 5/6 pi or 150 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = -sqrt 3/2, 1/2
What is the point pi or 180 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = -1,0
What is the point 7/6 pi or 210 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = -sqrt 3/2, -1/2
What is the point 5/4 pi or 225 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = -sqrt 2/2, -sqrt 2/2
What is the point 4/3 pi or 240 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = -1/2, -sqrt 3/2
What is the point 3/2 pi or 270 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = 0, -1
What is the point 5/3 pi or 300 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = 1/2, -sqrt 3/2
What is the point 7/4 pi or 315 degrees on the unit circle equal to? (unit circle practice)
(cos , sin ) = sqrt 2/2, -sqrt 2/2
What is the point 11/6 pi or 330 degrees on the unit circle equal to? (unit circle practice)
(cos, sin) = sqrt 3/2, -1/2
What is the sides on a 30, 60, 90 triangle?
x, sqrt3 x, 2x
What are the sides of a 45, 45, 90 triangle equal to?
x, x, sqrt2 x