trigonometry Flashcards
1
Q
sinx / cosx
A
tanx
2
Q
1 / sinx
A
cosec x
3
Q
1 / cosx
A
secx
4
Q
cosx / sinx
A
1 / tan x = cotx
5
Q
sin^2 x + cos^2 x
A
1
6
Q
1 + cot^2 x
A
cosec^2 x
7
Q
tan^2 x + 1
A
sec^2 x
8
Q
sin2x
A
2sinxcosx
9
Q
cos2x
A
cos^2x - sin^2 x
2cos^2x -1
1 - 2sin^2x
10
Q
tan2x
A
(2tanx) / (1-tan^2x)
