Trigonometric Identities Review

Identities

100

1 / (sin x)

csc x

200

(sin x) / (cos x)

tan x

300

1 / (sec x)

cos x

400

(cos² x) / (sin² x)

cot² x

500

1/ (tan x) in Quotient Identities

(cos x) / (sin x)

Simplifying Identities

100

(sec x)(cos x)

1

200

(tan x)(cos x)

sin x

300

(sec x) / (tan x)

csc x

400

sin x (csc x - sec x)

What is 1 - tan x?

500

csc x - sin x

What is (cos²x) / (sin x) or (cos x)(cot x) ?

Pythagorean Identities

100

sin²x + cos²x

1

200

1 + cot²x

csc²x

300

1 - cos²x

sin²x

400

sec²x - 1

tan²x

500

(csc x+1)(csc x-1)

cot²x

Ancient History

100

sin 30

1/2

200

Quadratic Function in Vertex form

f(x)=a(x-h)²+k

300

11pi/6 radians in degrees?

330 degrees

400

Factor 4x² - 9

 (2x + 3)(2x - 3)

500

Law of Cosine

c²=a²+b²-2abCosX

Math Jokes

100

What did the triangle say to the circle?

"You are pointless"

200

Math teacher's favorite places in NYC? 

Times Square!

300

What did the zero say to the eight?

"Nice Belt!"

400

Why did the two fours skip lunch?

Because they already eight!

500

How are the dollar and the moon similar?

They both have four quarters.