Evaluate the function f(x)=-cos(x) at x=π/2. Enter your answer in decimal form, if applicable.

Answer 1

To evaluate the function \( f(x) = -\cos(x) \) at \( x = \frac{\pi}{2} \), we first find the cosine of \( \frac{\pi}{2} \):

\[ \cos\left(\frac{\pi}{2}\right) = 0 \]

Now we substitute this value into the function:

\[ f\left(\frac{\pi}{2}\right) = -\cos\left(\frac{\pi}{2}\right) = -0 = 0 \]

Thus, the value of the function at \( x = \frac{\pi}{2} \) is

\[ \boxed{0} \]