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:
The answer is D, x = +-1 and +-3i
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Answer:
8. adjacent 9. vertical 10. adjacent
Step-by-step explanation:
