Question

If 2 cos square theta + sin theta -2 = 0
Find the value of theta
Plz answer it's important

Answer 1

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Answer 2

Hey Buddy ☺☺

Here's your answer :-

$2 { \cos}^{2} \theta \: + \sin\theta - 2 = 0 \\ \sin \theta = 2 - 2 { \cos }^{2} \theta \\ \sin\theta = 2( \: 1 - { \cos }^{2} \theta \: ) \\ \sin \theta = 2 { \sin}^{2} \theta \\ \frac{ \sin \theta }{ { \sin }^{2} \theta} = 2 \\ \frac{1}{ \sin \theta} = 2 \\ \sin \theta = \frac{1}{2} \\ \sin \theta = \sin(30) \\ on \: comparing \: \\ \theta =30$
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