Indentities Flashcards
1
Q
(sin^2)x+(cos^2)x
A
1
2
Q
(tan^2x)+1
A
(sec^2)x
3
Q
1+(cot^2)x
A
(csc^2)x
4
Q
sin(-x)
A
-sinx
5
Q
cos(-x)
A
cosx
6
Q
sin(x+y)
A
sinxcosy+cosxsiny
7
Q
cos(x+y)
A
cosxcosy-sinxsiny
8
Q
sin(x-y)
A
sinxcosy-cosxsiny
9
Q
cos(x-y)
A
cosxcosy+sinxsiny
10
Q
tan(x+y)
A
(tanx+tany)/(1-tanxtany)
11
Q
tan(x-y)
A
(tanx-tany)/(1+tanxtany)
12
Q
sin2x
A
2sinxcosx
13
Q
cos2x
A
(cos^2)x-(sin^2)x, 2(cos^2)x-1, 1-2(sin^2)x
14
Q
(cos^2)x
A
(1+cos2x)/2
15
Q
(sin^2)x
A
(1+cos2x)/2
