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Vladimir79 [104]
3 years ago
8

What is the measure of angle B in the figure below? о 30° О 45° О 60° O90°

Mathematics
1 answer:
Slav-nsk [51]3 years ago
6 0

Answer:

45°

Step-by-step explanation:

Using the cosine ratio in the right triangle

cosB = \frac{adjacent}{hypotenuse} = \frac{3}{3\sqrt{2} } = \frac{1}{\sqrt{2} }, hence

B = cos^{-1}( \frac{1}{\sqrt{2} } ) = 45°

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