Trig Identities Flashcards
0
Q
Cos(2x)
A
Cos^2(x) - sin^2(x) = 2cos^2(x) - 1
= 1 - 2sin^2(x)
1
Q
Sin(2x)
A
2sinxcosx
2
Q
Tan(2x)
A
2tan(x) / (1 - tan^2(x))
3
Q
sin^2(x)
A
1/2 - 1/2cos(2x)
4
Q
Cos^2(x)
A
1/2 + 1/2cos(2x)
