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

Sameer Puri asked Jul 3, 2023

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Sameer Puri asked Jul 3, 2023

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18 votes

Answer:

$\theta\approx56.31^\circ$

Review attached graph and explanation

Explanation:

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

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