Posted by **Christine** on Sunday, June 6, 2010 at 9:47pm.

Find all solutions if 0 degrees is less than or equal to x and x is less than 360 degrees.

2 sin^2(x)+ sin(x)=1

- Algebra 2 Honors -
**Reiny**, Sunday, June 6, 2010 at 9:50pm
hint:

treat it like a quadratic.

Some students like to change it using something like this:

let sin(x) = y , then

2y^2 + y - 1 = 0

this one factors nicely, once you found y, sub that back into sinx

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