In ΔDEF Measure of angle E is 90°. If cosD = $$\frac{5}{{13}}$$ and DE = 1 cm. Then what is Length of side EF?
A. 2.6
B. 2.4
C. 1.5
D. 2
Answer: Option B
Solution (By Examveda Team)
$$\eqalign{ & 5\,{\text{unit}} \to 1\,{\text{cm}} \cr & 1\,{\text{unit}} \to \frac{1}{5}\,{\text{cm}} \cr & {\text{EF}} = 2.4\,{\text{cm}} \cr} $$
This Question Belongs to Arithmetic Ability >> Circular Measurement Of Angle
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