Question

The value of \(\cos 15^\circ - \sin 15^\circ\) is equal to

• A. \(\frac{1}{\sqrt{2}}\)
• B. \(\frac{\sqrt{3}}{2}\)
• C. \(\frac{1}{3}\)
• D. \(\frac{1}{2}\)

Hint:

Use trigonometric identities to simplify expressions involving cosine and sine differences.

Answer 1

The Correct Option is A

Using the formula for the difference of cosines and sines, we can simplify this expression and find that the result is \(\frac{1}{\sqrt{2}}\).