Question

The value of $\cos 0^\circ$ will be:

• A. 1
• B. 0
• C. 2
• D. -1

Hint:

Always memorize the standard trigonometric values ($0^\circ, 30^\circ, 45^\circ, 60^\circ, 90^\circ$). They are directly used in many MCQs.

Answer 1

The Correct Option is A

Step 1: Recall trigonometric values at standard angles
From trigonometry, \[ \cos 0^\circ = 1, \cos 90^\circ = 0, \cos 180^\circ = -1. \]

Step 2: Apply for $0^\circ$
Thus, directly, \[ \cos 0^\circ = 1. \]

Step 3: Conclusion
Therefore, the value of $\cos 0^\circ$ is $1$.
The correct answer is option (A).