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Oksi-84 [34.3K]
3 years ago
6

10. In ABC, if A and B are acute angles, and sin A= 10/13 what is the value of cos A ?

Mathematics
1 answer:
Margarita [4]3 years ago
5 0

Answer:

In triangle AB, A and B are acute angles so. AC and BC are right angles.

Sin A = 10/13

13 is the hypotenuse side and 10 is the opposite side.

To find cos A.

From pythagorean theorem:

Step-by-step explanation:

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Nesterboy [21]

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For convenience, I labeled some points as shown in the attached picture.

Also, I assume \overline{AB} and \overline{BC} are tangents to the circle.

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