Question

2 sin^2 theta - cos theta + 4= 0​

Answer 1

Answer:

sin^2theta =1-cos^2

2(1-cos^2)-costheta +4=0

2-2cos^2-cos+4=0

2cos^2+cos-6=0

2cos^2+4cos-3cos-6=0

Step-by-step explanation:

2cos(cos+2)-3(cos+2)=0

cos=3/2

cos=-2

non is possible because range of cos is -1 to 1

then

non is possible