choose the right formula
Anonymous Quiz
8%
cot^2 θ + 1 = tan^2 θ
76%
cot^2 θ + 1 = cosec^2 θ
8%
cot^2 θ + 1 = sec^2 θ
9%
cot^2 θ - 1 = tan^2 θ
sin(2x) =
Anonymous Quiz
82%
2 sin(x)cos(x)
6%
sin(x)^2 cos(x)^2
5%
1/2 sin(x) cos(x)
6%
None of these
cos(2x) =
Anonymous Quiz
24%
cos^2 x - sin^2 x
9%
2cos^2 x - 1
14%
1 - 2sin^2 x
53%
All of the above
tan(2x) =
Anonymous Quiz
81%
2 tan(x)/ 1-tan^2(x)
8%
tan(x)/ 1-tan^2(x)
4%
tan(x)/ 2-tan^2(x)
7%
2 tan(x)/ 1+tan^2(x)