4 years ago

In the figure, m∠B = m∠C and ∠D is a right angle. cos B =

Mathematics

2 answers:

Anna [14]4 years ago

5 0

Because m∠B = m∠C, therefore
cosB = cosC

By definition,
$cosC= \frac{CD}{AC}$

Therefore
$cosB= \frac{CD}{AC}$

vagabundo [1.1K]4 years ago

4 0

Answer:

sin A

Step-by-step explanation:

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