SOLUTION: if cota=12÷5 than sina+cosa=?

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Question 1000920: if cota=12÷5 than sina+cosa=?
Answer by Alan3354(69443) About Me  (Show Source):
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if cota=12÷5 than sina+cosa=?
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cot = x/y = 12/5
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r+=+sqrt%28x%5E2+%2B+y%5E2%29+=+13
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sin = y/r = 5/13
cos = x/r = 12/13
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sin + cos = 17/13 if a is in Q1
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If a is in Q3:
sin + cos = -17/13