QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
What is cos 45°?
O A. $\frac{1}{\sqrt{2}}$
O B. $\sqrt{2}$
O C. 1
O D. $\frac{1}{2}$
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Answer
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Step 1: Recall the value of cos(45 degrees) from a trigonometry table or formula.
cos(45^\circ) = \frac{1}{\sqrt{2}}
The cosine of 45 degrees is given by the following formula:
Step 2: Compare the obtained value with the given answer choices.
cos(45^\circ) = \frac{1}{\sqrt{2}} \approx 0.7071
Comparing the calculated value with the given answer choices, we find that:
Final Answer
The correct answer is option A: \frac{1}{\sqrt{2}}.
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