Unit 7 Flashcards
Some must be memorized, others can be derived
1
Q
sinA/cosA
A
tanA
2
Q
cosA/sinA
A
cotA
3
Q
sin(-A)
A
-sin(A)
4
Q
cos(-A)
A
cos(A)
5
Q
tan(-A)
A
-tan(A)
6
Q
sin²(A) + cos²(A)
A
1
7
Q
1-sin²(A)
A
cos²(A)
8
Q
1-cos²(A)
A
sin²(A)
9
Q
tan²(A)+1
A
sec²(A)
10
Q
sec²(A)-tan²(A)
A
1
11
Q
1+cot²(A)
A
csc²(A)
12
Q
csc²(A)-cot²(A)
A
1
13
Q
csc²(A)-1
A
cot²(A)
14
Q
sec²(A)-1
A
tan²(A)
15
Q
cos(A+B)
A
cosAcosB-sinAsinB
16
Q
cos(A-B)
A
cosAcosB+sinAsinB
17
Q
sin(A+B)
A
sinAcosB+cosAsinB
18
Q
sin(A-B)
A
sinAcosB-cosAsinB
19
Q
tan(A+B)
A
tanA+tanB
____________
1-tanAtanB
20
Q
tan(A-B)
A
tanA-tanB
____________
1+tanAtanB
21
Q
sin(2x)
A
2cos(x)sin(x)
22
Q
tan(2x)
A
2tan(x)
_________
1-tan²(x)
23
Q
cos(2x) (with negative sin)
A
cos²x-sin²x
24
Q
cos(2x) (without sin)
A
2cox²x-1
25
Q
cos(2x) (without cos²x)
A
1-2sin²x
