Trig Identities + ln identities Flashcards
1
Q
sinx
A
1/cscx
2
Q
cosx
A
1/secx
3
Q
tanx
A
1/cotx=sinx/cosx
4
Q
cscx
A
1/sinx
5
Q
secx
A
1/cosx
6
Q
cotx
A
1/tanx=cosx/sinx
7
Q
sin^2x+cos^2x
A
=1
8
Q
tan^2x+1
A
sec^2x
9
Q
cot^2x+1
A
csc^2x
10
Q
sin(2x)
A
2sinxcosx
11
Q
cos(2x)
A
cos^2(x)-sin^2(x)
12
Q
sin^2x
A
1/2(1-cos(2x))
13
Q
cos^2x
A
1/2(1+cos(2x))
14
Q
lna-lnb
A
ln(a/b)
15
Q
lna+lnb
A
ln(ab)
