Trigonometry Examples

$\cos ((2 n + 1) \cdot 90 °)$

Step 1

Apply the distributive property.

$\cos (2 n \cdot 90 ° + 1 \cdot 90 °)$

Step 2

Multiply.

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Step 2.1

Multiply $90 °$ by $2$ .

$\cos (180 n + 1 \cdot 90 °)$

Step 2.2

Multiply $90 °$ by $1$ .

$\cos (180 n + 90 °)$

$\cos (180 n + 90 °)$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$