Question

Choose correct option for following statement.

$\cos \theta$ decreases as $\theta$ increases in the interval $(0,\pi )$.

• A. The given statement is correct.
• B. The given statement is wrong.
• C. Incomplete information
• D. None of these

Answer 1

The correct option is A The given statement is correct.

$\cos 0^o=1$, $\cos {45}^o=\frac{1}{\sqrt{2}}=0.707$,$\cos {90}^o=0$ and $\cos \pi =-1$
Hence, with increasing angle the value of $\cos \theta$ will decrease in the interval $(0,\pi )$.