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REY [17]
4 years ago
7

A circle has the radius of 4 cm. Find the length s of the arc intercepted by a central angle of pie/4 radians.

Mathematics
1 answer:
alexgriva [62]4 years ago
3 0

Answer:

3.1 cm

Step-by-step explanation:

S = r × theta

S = 4 × pi/4

S = pi

S = 3.14 cm

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IMAGE 1: Find the value of the indicated trigonometric ratio cos α
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Answer:

28.07° ; 70.53° ; 53.13° ; 36.87°

Step-by-step explanation:

Using PYTHAGORAS RULE :

IMAGE 1:

value of cos α equals :

cos α = Adjacent / Hypotenus

cos α = 15 / 17

cos α = 0.88235

α = cos^-1 (0.88235)

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IMAGE 2:

sin β = Opposite / Hypotenus

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IMAGE 3:

From trigonometry :

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IMAGE 4:

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α = 36.87°

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