Simplifying Identities
Solving Trig Equations
Pythagorean Identities
Find Possible Values
Complementary Angles Identities
100
(sec A)(cos A)
1
100
Solutions 0 to 360 degrees for sin A = √3 / 2
60 and 120 degrees
100
sin² A + cos² A
1
100
If cos A = 4/5, and sin A < 0, find tan A
- 3/4
100
cos (90 - A)
sin A
200
(tan A)(cos A)
sin A
200
Solutions 0 to 360 degrees for cos x = - 1/2
120 and 240 degrees
200
1 + cot² A
cosec² A
200
If tan A = -8/15 and sin A > 0, find cos A
-15/17
200
cot (90 - A)
tan A
300
(sec A) / (cot A)
cosec A
300
All solutions 0 to 360 degrees for 2sinA - 1 = 0
30 and 150 degrees
300
1 - cos² A
sin² A
300
If sin A = -1/3, and tan A < 0, find sec A
(3 / 2√2) or (3√2 / 4)
300
cosec (90 - A)
sec A
400
sin A (cosec A - sec A)
1 - tan A
400
All solutions 0 to 360 degrees for 2sinA - √2 = 0
45 and 135 degrees
400
sec² A - 1
tan² A
400
If A is an acute angle and cos A = 1/3, find sin A
(2√2) / 3
400
Simplify cos (90 - A) / sin (90 - A)
tan A
500
cosec A - sin A
(cos²A) / (sin A) or (cos A)(cot A)
500
Solutions 0 to 360 degrees for 2cos² A - 3/2 = 0
30 and 150 and 210 and 330 degrees
500
(1 + cosec A)(1 - cosec A)
- cot² A
500
If sin A = -5/13 and tan A is positive, find cos A
- 12/13
500
Simplify sin (A - 90)
- cos A
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