Trigonometry Flashcards
1
Q
normal trig squar
A
sin^2 x + cos^2 x = 1
2
Q
Normal trig fraction
A
sin x/ cos x = tan x
3
Q
Sin 2 x
A
2 sin x * cos x
4
Q
cos 2 x =
A
= cos^2 x - sin^2 x
= (2cos^2 x) - 1
= 1 - (2sin^2 x)
5
Q
tan 2x
A
(2*tan x)/(1 - tan^2 x)
