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