Trig Flashcards
1
Q
Cos(2a)
A
=1-2sin^2(a)
=2cos^2(a)-1
2
Q
Sin(2a)
A
=2cos(a)sin(a)
3
Q
Tan(2a)
A
= [2tan(a)] / [1-tan^2(a)]
4
Q
Sin(-a)
A
=-sin(a)
5
Q
Cos(-a)
A
Cos(a)
6
Q
Sec^2(x)
A
Tan^2(x) +1
7
Q
Cosec^2(x)
A
1+ cot^2(x)
8
Q
1
A
Sin^2(x) + cos^2(x)
9
Q
Sec^2(x)
A
Tan^2 (x) +1
10
Q
1/sin^2(x)
A
[sin^2(x)] / [sin^2(x)] + [cos^2(x)] / [sin^2(x)]
