Identities Flashcards
1
Q
csc(x)
A
1/sin(x)
2
Q
sec(x)
A
1/cos(x)
3
Q
cot(x)
A
1/tan(x)
4
Q
1/tan(x)
A
cos(x)/sin(x)
5
Q
tan(x)
A
1/cot(x)
6
Q
1/cot(x)
A
sin(x)/cos(x)
7
Q
sin^2(t) + cos^2(t)
A
1
8
Q
tan^2(t) + 1
A
sec^2(t)
9
Q
1 + cot^2(t)
A
csc^2(t)
10
Q
sin(–t)
A
–sin(t)
11
Q
cos(–t)
A
cos(t)
12
Q
tan(–t)
A
–tan(t)
13
Q
sin(x)+sin(y)
A
2sin( x+y/2)cos(x−y/2)
14
Q
sin(x)−sin(y)
A
2cos(x+y/2) sin(x−y/2)
15
Q
cos(x)+cos(y)
A
2cos(x+y/2)cos(x−y/2)
