Trigonometric Identities
Trigonometric Formulas
The Unit Circle
Angles and Radians
Random Trig
100
The reciprocal of sine (sin)
What is co-secant (csc)
100

sin(pi/2 - x)

What is cos x

100
cos (√3/2)
What is cos (π/6)
100
The equation for arc length
What is s = θr
100

30-60-90 and 45-45-90

What are the two special right triangles

200
sin x / cos x
What is the quotient identity of tangent (tan)
200

cos a cos b + sin a sin b

What is cos(a-b)

200
π in degrees
What is 180°
200

1 radian = ____ degrees divided by pi

What is 180°

200

sin 0 degrees

What is 0.

300
sin (-x)
What is -sin x
300
sin (2x)
What is 2sinx * cosx
300

One full unit circle in radians and degrees

What is 360° and 2π

300

-270 degrees in radians

What is pi/2

300

cos pi/6

What is square root 3/2

400
!!!DOUBLE GEOPARDY!!! The most important Pythagorean Identity
What is sin^2 x + cos^2 x = 1
400

cos2x -sin2x =

What is cos (2x)

400
225° in radians
What is 5π/4
400

-π/4 in degrees

What is -45°

400

sec 30 degrees

What is 2/squ root 3
500
cos x = 5/6, sin =
What is √11/6
500

a2 = b2 + c2 - 2ab cosA

What is the law of cosines.

500
(0, -1) on the Unit Circle
What is 270° or 3π/2
500

225 degrees to radians

What is 5pi/4 

500

sin 11pi/6

What is -1/2

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