Trigonometric Identities Review

Identities

100

1 / (sin x)

What is csc x?

200

(sin x) / (cos x)

What is tan x?

300

1 / (sec x)

What is cos x?

400

(cos x) / (sin x)

What is cot x?

500

cos (-x)

What is cos x?

Simplifying Identities

100

(sec x)(cos x)

What is 1?

200

(tan x)(cos x)

What is sin x?

300

(sec x) / (tan x)

What is 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

What is 1?

200

1 + cot²x

What is csc²x?

300

1 - cos²x

What is sin²x?

400

sec²x - 1

What is tan²x?

500

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

What is -cot²x ?

Ancient History

100

What does sin 30 equal?

What is 1/2?

200

What does tan 135 equal?

What is -1?

300

What is 11pi/6 radians in degrees?

What is 330 degrees?

400

Factor using difference of two squares 4x² - 9

What is (2x + 3)(2x - 3)

500

How many degrees total are there in 4 circles?

What is 1,440 degrees

General Mathematics

100

Solve the system of equations: y = –3x + 4
x + 4y = –6 

What is (2,-2)?

200

Rationalize: 2/sqrt(7)

What is 2sqrt(7)/7 ?

300

Solve for x:     2x-7=13

What is x=10?

400

If you have 15 marbles, 3 red, 7 white, and 5 blue. What percent of the marbles are blue OR red?

What is 53% ?

500

Solve: i*i?

What is -1 ?