Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Units and Measurements

Question:

If \(\theta = \frac{1}{3}\), then find the value of cos \(\theta\).

Options:

\(\frac{\sqrt{2}}{3}\)

\(\frac{1}{3}\)

\(\frac{2\sqrt{2}}{3}\)

\(\frac{2}{3}\)

Correct Answer:

\(\frac{2\sqrt{2}}{3}\)

Explanation:

Cos \(\theta = \sqrt{1 - sin^2 \theta}\)

Cos \(\theta = \sqrt{1 - \frac{1}{9}}\)

Cos \(\theta = \frac{2\sqrt{2}}{3}\)