Precalculus Examples

$\sin (77)$

Step 1

The complement of $\sin (77)$ is the angle that when added to $\sin (77)$ forms a right angle ( $90 °$ ).

$90 ° - \sin (77)$

Step 2

Simplify each term.

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Step 2.1

Evaluate $\sin (77)$ .

$90 - 1 \cdot 0.97437006 °$

Step 2.2

Multiply $- 1$ by $0.97437006$ .

$90 - 0.97437006 °$

Step 3

Subtract $0.97437006$ from $90$ .

$89.02562993 °$