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cos
2
x + sin
2
x
cos
2
q
cos
45
90
60
30
315
360
330
300
210
240
270
225
135
150
180
120
+ sin
2
q
1
1 – cos
2
x
sin
2
x
1 – sin
2
x
cos
2
x
1 + tan
2
x
sec
2
x
sec
2
x – 1
tan
2
x
sec
2
x – tan
2
x
1
1 + cot
2
x
csc
2
x
csc
2
x – 1
cot
2
x
csc
2
x – cot
2
x
1
sin 2x
2(sin x)(cos x)
cos 2x
cos
2
x – sin
2
x OR 2cos
2
x – 1 OR 1 – 2sin
2
x
tan 2x
2 tanx
1 – tan
2
x
sin (x + y)
(sin x)(cos y) + (sin y)(cos x)
sin (x – y)
(sin x)(cos y) – (sin y)(cos x)
cos (x + y)
(cos x)(cos y) – (sin x)(sin y)
cos (x – y)
(cos x)(cos y) + (sin x)(sin y)
tan (x + y)
tan x + tan y
1 – tanxtany
Author
roniman
ID
98270
Card Set
Trig ID
Description
trig identities
Updated
9/6/2011, 7:27:53 AM
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