निम्नलिखित समीकरणों से `theta` के व्यापक मान ज्ञात कीजिये -
(i) ` 2 cos^(2) theta + 3 sin theta =0`
(ii) ` sin^(2) theta - 2 cos theta + 1/4 =0`
(iii) ` tan theta - sin theta = sin theta tan theta -1`
(iv) ` sin^(2) theta - (1+sqrt(3))sin theta cos theta + sqrt(3) cos^(2) theta = 0 `

Explanation

(i) ` theta = npi -(-1)^(n)pi/6` (ii) ` theta = 2npi pm pi/3`
` theta = npi -pi/4,theta = npi + (-1)^(n).pi/2` (iv) ` theta = npi +pi/4,theta = npi +pi/3`