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Identities
Simplifying Identities
Pythagorean Identities
Solving Trig Equations
Ancient History
100
1 / (sin x)
What is csc x?
100
(sec x)(cos x)
What is 1?
100
sin²x + cos²x
What is 1?
100
Solutions 0 to 360 degrees for sin x = √3 / 2
What is 60 and 120 degrees?
100
sin 30
What is 1/2?
200
(sin x) / (cos x)
What is tan x?
200
(tan x)(cos x)
What is sin x?
200
1 + cot²x
What is csc²x?
200
Solutions 0 to 2π for cos x = -½
What is 2π/3 and 4π/3?
200
tan 135
What is -1?
300
1 / (sec x)
What is cos x?
300
(sec x) / (tan x)
What is csc x?
300
1 - cos²x
What is sin²x?
300
All solutions 0 to 360 degrees for 2sinx - 1 = 0
What is 30 and 150 degrees?
300
11pi/6 radians
What is 330 degrees?
400
(cos x) / (sin x)
What is cot x?
400
sin x (csc x - sec x)
What is 1 - tan x?
400
sec²x - 1
What is tan²x?
400
All solutions 0 to 2π for 4sin²x - 1 = 0
What is π/6, 5π/6, 7π/6, and 11π6?
400
Factor 4x² - 9
What is (2x + 3)(2x - 3)
500
cos (-x)
What is cos x?
500
csc x - sin x
What is (cos²x) / (sin x) or (cos x)(cot x) ?
500
(1 + csc x)(1 - csc x)
What is -cot²x ?
500
All solutions in radians for 2sinx - √2 = 0
What is ∏/4 ± 2∏n and 3∏/4 ± 2∏n?
500
2/(x + 1) + 3/(x - 1)
What is (5x + 1) / (x² - 1)