Question

The number of roots of the equation \(2 \sin^2\theta + 3\sin\theta + 1 = 0\) in the interval (0, 2) is

Answer 1

its sin^2theta and sin theta

Answer 2

(0,2pi)

Answer 3

if we put 0 we get 1
if we put 2pi we get?

Answer 4

@ganeshie8

Answer 5

x=sin theta then 2x^2+3x+1=0

Answer 6

x=-0.5,-1

Answer 7

sinx=-1/2,sinx=-1

Answer 8

yes!

Answer 9

solve each of them :

sinx = -1/2
x = ?

Answer 10

what angles make the sin value equal to -1/2 ?

Answer 11

familiar with unit circle, right ?

Answer 12

5pi/6

Answer 13

unit circle means circle with radius 1

Answer 14

there will be two angles that make sin value equal to -1/2 :