Type the expression. Press Enter.
Note: Set a single-line fraction by typing a backslash (\) before the forward slash (/).

Context Panel: Approximate≻10 (digits)

Type the expression. Press Enter.
There is no better expression for the exact value than $\cos \left(1\right)$.

Context Panel: Approximate≻10 (digits)

Type the expression. Press Enter.
This time there is a better expression for the exact value, but Maple does not provide it automatically.

Context Panel: Conversions≻To Radical

Context Panel: Approximate≻10 (digits)

Type either ${\mathbf{sec}}^{\mathbf{-}\mathbf{1}}$ or $\mathbf{arcsec}$.

Context Panel: Evaluate and Display Inline

Context Panel: Approximate≻10 (digits)

Assign the expression and use evalf.

$q≔\sin \left(\mathrm{\pi }\/4\right)\; \mathrm{evalf}\left(q\right)$

Assign the expression and use evalf.

$q≔\cos \left(1\right)\; \mathrm{evalf}\left(q\right)$

Assign the expression and use evalf.

Radical form: Use the convert command as shown.

$q≔\tan \left(\mathrm{\pi }\/12\right)\; \mathrm{evalf}\left(q\right)$

$\mathrm{convert}\left(q\,\mathrm{radical}\right)$

In math mode type either ${\sec }^{-1}$ or arcsec.

$q≔{\sec }^{-1}\left(\frac{2}{\mathrm{sqrt}\left(3\right)}\right)\; \mathrm{evalf}\left(q\right)$