Trigonometric Identities
Trigonometric Formulas
The Unit Circle
Angles and Radians
Two Years With Mrs. Gomes
100
The reciprocal of sine (sin)
What is co-secant (csc)
100
cos (x + y)
What is cos x * cos y - sin x * sin y
100
cos (√3/2)
What is cos (π/6)
100
The equation for arc length
What is s = θr
100

The young and unexpected member of our Geometry class.

Who was Cassidy Gomes?

200
sin x / cos x
What is the quotient identity of tangent (tan)
200
sin (x/2)
What is ±√((1 - cos x) / 2)
200
π in degrees
What is 180°
200
1 radian = ____ degrees divided by π
What is 180°
200

The tool we used along with our knowledge of angles to hit targets on the wall.

What are laser pointers?

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
1° = ____ radians divided by 180
What is π
300

The answer Mrs. Gomes gave when her professor asked her the value of 23 on her first day of college?

What is 6?

400
!!!DOUBLE GEOPARDY!!! The most important Pythagorean Identity
What is sin^2 x + cos^2 x = 1
400
1/2[cos(4x - 6x) - cos (4x + 6x)] 1/2[cos(-2x) - cos(10x)] 1/2[cos(2x) - cos(10x)]
What is sin(4x)sin(6x)
400
225° in radians
What is 5π/4
400
-π/4 in degrees
What is -45°
400

The instrument we got in trouble for playing during Compass.

What is a piano?

500
cos x = 5/6, sin =
What is √11/6
500
-2sin((6x + 2x)/2) * sin ((6x - 2x)/2) -2sin(8x/2) * sin (4x/2) -2sin(4x) * sin (2x)
What is cos(6x) - cos(2x)
500
(0, -1) on the Unit Circle
What is 270° or 3π/2
500
42° 20' 35" in degrees
What is 42.343°
500

The student who used his or her knowledge of geometry on the job.

Who is Cole?

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