Question

2cossquretheta+√3costheta-3=0 whast is costheta

Answer 1

Gn that

$2 { \cos(x) }^{2} - \sqrt{3} \cos(x) = 0$
ie

$\cos(x)(2 \cos(x) - \sqrt{3)} = 0$
ie

$2 \cos(x) = \sqrt{3}$
ie

$cos x = \sqrt{3} ÷ 2$

ie

x=30