Question

please solve this question urgent please

Answer 1

correct answer is value of threta is 30 degree
2*(√3/2)^2 +1/2 = 3/2+1/2
= 2
I hope this is correct

Answer 2

2cos^2(theta) + sin(theta)=2

sin^2(theta)+ cos^2(theta)=1
cos^2(theta)=1--sin^2(theta)

Substitute in 1st equation...
2{1--sin^2(theta)] + sin(theta)=2

Cancel 2 on both sides

--2sin^2(theta)+sin(theta)=1

sin(theta)=2sin^2(theta)

cancelling sin(theta) on both sides..

2sin(theta)=1 ==》sin(theta)=1/2

theta=30 degree

===================
Hope it helps you...M