Trigonometric Identities Flashcards
1
Q
Reciprocal Identities
cscx
A
1/sinx
2
Q
Reciprocal Identities
tanx
A
1/cotx
3
Q
Reciprocal Identities
sinx
A
1/cscx
4
Q
Reciprocal Identities
cosx
A
1/secx
5
Q
Reciprocal Identities
secx
A
1/cosx
6
Q
Reciprocal Identities
cotx
A
1/tanx
7
Q
Quotient Identities
tanx
A
sinx/cosx
8
Q
Quotient Identities
cotx
A
cosx/sinx
9
Q
Pythagorean Identities
sin^2x+cos^2x
A
1
10
Q
Pythagorean Identities
tan^2x+1
A
sec^2x
11
Q
Pythagorean Identities
1+cot^2x
A
csc^2x
12
Q
Even odd formulas
cos or sec (-0)
A
cos or sec (0)
13
Q
Even odd formulas
sin or tan or csc or cot(-0)
A
-sin or -tan or -csc or -cot(0)
14
Q
Double Angle Formulas
sin(2x)
A
2sinxcosx
15
Q
Double Angle Formulas
cos(2x)
A
cos^2x-sin^2x
1-2sin^2x
2cos^2x-1
16
Q
Double Angle Formulas
tan(2x)
A
2tanx/1-tan^2x
17
Q
Power Reducing Formulas
Sin^2x
A
1/2[1-cos2x]
18
Q
Power Reducing Formulas
Cos^2x
A
1/2[1+cos2x]
