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Trig equations
Contributed by: Tsygan
(Original author: Crouch)
π

0

Find the solutions in the interval {0,2π)
π/2
type yes or no in each box.
2cos(x)sin(x) + sin(x) =0
4π/3
2π/3
3π/2
Find the solutions in the interval (0, 2π) 

π/2, 3π/2, 7π/6, 11π/6

4π/3, 5π/3, π/2

π/2, 7π/6, 11π/6

π/6, 5π/6, π/2, 3π/2

2cos2x +sinx -1 =0
-3π/4
3π/4

π/6

π/4
Find the solutions in the interval {-π,π)
type yes or no in each box.

1-tan2(x) =0

-π/4
5π/4
9π/4

4π/3

How many solutions are there 
in the interval {0,2π) for
Infinitely many
type yes or no in each box.
cos(x) + sin(x)*tan(x) =2

0 solutions

2 solutions
1 solution
Find all solutions.
2cos(2x) -1 =0

π/6 +kπ & 11π/6 +kπ

π/3 +2kπ & 5π/6+2kπ

π/3+kπ & 2π/3+kπ

π/6 +2kπ  & 11π/6 + 2kπ
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