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2 answers:
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The arc length, radius and the included angle are related as
where
is in radians.
The radius is given by
Correct choice is (B).
Answer:
Step-by-step explanation:
Recall the mnemonics SOH CAH TOA.
SOH means the Sine ratio is Opposite over Hypotenuse.
This implies that;
The side opposite to angle A is 4cm and the hypotenuse is 5cm.