Question

If \(\sin\theta=\frac{3}{5}\), then \(\cos\theta=\)

• A. \(\frac{4}{5}\) but not \(-\frac{4}{5}\)
• B. \(-\frac{4}{5}\) or \(\frac{4}{5}\)
• C. \(-\frac{4}{5}\) but not \(\frac{4}{5}\)
• D. \(\frac{3}{5}\) but not \(-\frac{3}{5}\)

Hint:

If only \(\sin\theta\) is given and quadrant is not mentioned, then \(\cos\theta\) may have both positive and negative values.

Answer 1

The Correct Option is B