Preston2369 Preston2369

19-04-2024
Mathematics

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Given that cosA=(-4)/(5) with angle A in quadrant II and sinB=(-24)/(25) with angle B in quadrant III. Find cos(A+B).
a. (3)/(5)
b. (-4)/(5)
c. (4)/(5)
d. (-3)/(5)
e. none of these

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