Trigonometry Examples

$11^{2} + 28^{2} - 2 \cdot 11 \cdot 28 \cos (41)$

Step 1

Simplify each term.

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Step 1.1

Raise $11$ to the power of $2$ .

$121 + 28^{2} - 2 \cdot 11 \cdot (28 \cos (41))$

Step 1.2

Raise $28$ to the power of $2$ .

$121 + 784 - 2 \cdot 11 \cdot (28 \cos (41))$

Step 1.3

Multiply $- 2$ by $11$ .

$121 + 784 - 22 \cdot (28 \cos (41))$

Step 1.4

Multiply $28$ by $- 22$ .

$121 + 784 - 616 \cos (41)$

$121 + 784 - 616 \cos (41)$

Step 2

Add $121$ and $784$ .

$905 - 616 \cos (41)$

Step 3

The result can be shown in multiple forms.

Exact Form:

$905 - 616 \cos (41)$

Decimal Form:

$440.09889858 \dots$

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