Question

5. सिद्ध कीजिए : cos2 30° + sin^2 30° = 1.
A_AE
कीजिा कि​

Answer 1

Answer:

$\red{ cos^{2} 30\degree + sin^{2} 30\degree}\green{=1}$

Step-by-step explanation:

$LHS = cos^{2} 30\degree + sin^{2} 30\degree \\=\left( \frac{\sqrt{3}}{2}\right)^{2} + \left( \frac{1}{2}\right)^{2}\\= \frac{3}{4} + \frac{1}{4}\\= \frac{4}{4}\\= 1 \\= RHS$

$Hence,proved$

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