Question

3sin^2theta+7sinsintheta +2=0

Answer 1

sinsin?

Answer 2

I answered this already?

Answer 3

would u anser again

Answer 4

http://openstudy.com/users/lagrangeson678#/updates/4f0b0ec4e4b014c09e64aa3e

Answer 5

replace sin(x) with a varaible, then solve the resulting quadratic

Answer 6

*sin(theta)

Answer 7

after replacing sin theta with a, we get:

3a^2+7a+2=0

Answer 8

after that

Answer 9

well you gotta factor it, you should get:
(a+2)(3a+1)=0

Answer 10

Then solve for a ineach term:

a+2=0----->a=-2

3a+1=0---->a=-1/3

Answer 11

then replace a with sin(theta)

Answer 12

but\[-1 \le \sin \theta \le 1\]

so neglect the a=-2

and solve for theta in sin(theta)= -1/3

Answer 13

Nice job @lalaly

Answer 14

lol thankyou :$