question 2

calculate the exact value of \cos(60^{\circ}) without using a calculator.

0.25
i dont know
0.85
0.75
0.15
0.5

Question

question 2

calculate the exact value of \cos(60^{\circ}) without using a calculator.

0.25
i dont know
0.85
0.75
0.15
0.5

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": true, "concepts_used": [ "Right Triangle Trigonometry", "Trigonometric Ratios" ], "new_concepts": [ "Special Angles Trigonometry" ], "current_concepts": [ "Right Triangle Trigonometry", "Trigonometric Ratios", "Special Angles Trigonometry" ] } ## Identify the trigonometric ratio for a special angle $$ \theta = 60^\circ $$ ## Evaluate the cosine of the special angle $$ \cos(60^\circ) = \frac{1}{2} = 0.5 $$

0.25

I don't know

0.85

0.75

0.15

0.5

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Question

Explanation:

Identify the trigonometric ratio for a special angle

Evaluate the cosine of the special angle

Answer: