Evaluate the angle with ordered pair (2,-3)for cosine.

asked Oct 9, 2023 94.0k views

6 votes

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6 votes

Answer:

$\theta\approx56.31^\circ$

Review attached graph and explanation

Explanation:

Since
$cos\theta=(adjacent)/(hypotenuse)$ , then
$cos\theta=(2)/(√(13))\rightarrow\theta=cos^(-1)((2)/(√(13)))\approx56.31^\circ$

Kenny Peng answered Oct 13, 2023

7.5k points

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