Trigonometry Flashcards
1
Q
Sin2x
A
2sinxcosx
1
Q
Cos2x
A
Cos^2x - Sin^2 x
1- 2sin^2x
2cos^2x-1
2
Q
Tan2x
A
2tanx / 1-tan^2x
3
Q
cos^2 + sin^2 = 1
A
divide by sin
cot^2x + 1 = cosec^2x
divide by cos
1 + tan^2x = sec^2 x
4
Q
1/cosx
A
secx
5
Q
1/tan x
A
cotx
cosx/tanx
6
Q
1/sinx
A
cosecx
