Thread: How do I solve this trig equation??

Find the EXACT solutions of the given equation in the interval [0,2π). If there is more than one answer, enter them in a list separated by commas. Decimal approximations and symbolic trigonometric expressions such as arctan(5) will be marked incorrect.

2sin^2(x)-5sin(x)+2=0

Where do I even begin on this? I'm lost and my professor has stopped coming because of an injury and I have a test Wendesday. I'd appreciate all the help I can get! Thanks so much in advance.

Originally Posted by dcowboys107

Find the EXACT solutions of the given equation in the interval [0,2π). If there is more than one answer, enter them in a list separated by commas. Decimal approximations and symbolic trigonometric expressions such as arctan(5) will be marked incorrect.

2sin^2(x)-5sin(x)+2=0

Where do I even begin on this? I'm lost and my professor has stopped coming because of an injury and I have a test Wendesday. I'd appreciate all the help I can get! Thanks so much in advance.

ok let u= sin x









and this can't be true since sin x is bounded by -1 and 1