Answer:
The exact value of sin A is opp/hyp = -12/13
Step-by-step explanation:
If A is in Quadrant IV then the "opposite side" is negative and the "adjacent side" is positive. Since sec A = hyp / adj = 13 / 5 and since opp^2 + adj^2 must add up to hyp^2, Therefore y = √(hyp^2 - adj^2), or
y = -√(13^2 - 25) = -√144 = 12.
The exact value of sin A is opp/hyp = -12/13
Circumference = πD
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Given that the circumference is 75cm, find Diameter:
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πD = 75
D = 75 ÷ 3.14
D = 23,89 cm
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Find Radius:
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Radius = Diameter ÷ 2
Radius = 23.89 ÷ 2
Radius = 11.94 cm
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Find Surface Area:
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Area = πr²
Area = 3.14 x 11.94²
Area = 447.65 cm²
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Answer: 447.65cm²
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I think it’s B
Sorry if I’m wrong
