Question

2 cos squared theta + 3 sin theta - 3 = 0 determine the value of theta..​

Answer 1

Answer:

soory don't know the ans

Answer 2

Answer:

2cos^2thita+3sinthita-3=0

2(1-sin^2thita)+3sinthita-3=0

2-2sin^2thita+3sinthita-3=0

let sinthita=x

2x^2-3x+1=0

2x^2-2x-x+1=0

2x(x-1)-1(x-1)=0

(2x-1)(x-1)=0

either 2x-1=0

x=1/2

so sinthita=1/2

thita =30

or x-1=0

x=1

sinthita=1

thita =90