Trig Identities Flashcards
1
Q
sin^2 + cos^2
= ??
A
1
2
Q
1 = ?
[cos and sin]
A
sin^2 + cos^2
3
Q
a^2 = ?
A
1 - b^2
-b^2 + 1
4
Q
cos goes with _____
A
sin
5
Q
sin goes with ____
A
cos
6
Q
csc goes with _____
A
cot
7
Q
cot goes with _____
A
csc
8
Q
sec goes with _____
A
tan
9
Q
tan goes with ______
A
sec
10
Q
sin (a+b) = ?
sin (a-b) = ?
A
sin(a)cos(b) + sin(b)cos(a)
sin(a)cos(b) - sin(b)cos(a)
11
Q
cos (a+b) = ?
cos (a+b) = ?
A
cos(a)cos(b) - sin(a)sin(b)
cos(a)cos(b) + sin(a)sin(b)
12
Q
sin(2a) = ?
A
2sin(a)cos(a)
13
Q
cos(2a) = ?
A
cos^2 - sin^2
1 - 2sin^2
2cos^a - 1
14
Q
cos^2 - sin^2 = ?
A
cos (2a)
15
Q
1 - 2sin^2 = ?
A
cos (2a)
16
Q
2cos^a - 1
A
cos (2a)
