Trigonometry Examples

$d = 2 \cos (2 π) t$

Step 1

Simplify $2 \cos (2 π) t$ .

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Step 1.1

Subtract full rotations of $2 π$ until the angle is greater than or equal to $0$ and less than $2 π$ .

$d = 2 \cos (0) t$

Step 1.2

The exact value of $\cos (0)$ is $1$ .

$d = 2 \cdot 1 t$

Step 1.3

Multiply $2$ by $1$ .

$d = 2 t$