Trig identities Flashcards
1
Q
1 + tan^2(x) = ?
A
cos^2(x)
2
Q
cos^2(x) - tan^2(x) = ?
A
1
3
Q
1 + cot^2(x)
A
cosec^2(x)
4
Q
cosec^2(x) - cot^2(x)
A
1
5
Q
sin(2a) = ?
A
2sin(a)cos(a)
6
Q
cos(2a) = ?
A
cos^2(a) - sin^2(a)
2cos^2(a) - 1
1 - 2sin^2(a)
7
Q
tan(2a) = ?
A
2tan(a)/1-tan^2(a)
