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AleksandrR [38]
3 years ago
12

Use the equation Sin (2x -9) = Cos (x+30) to solve for x. Remember that these are complementary angles!

Mathematics
1 answer:
pogonyaev3 years ago
4 0
Well, if the two angles are complementary, then that means that

(2x -9)° + (x + 30)° = 90°

\bf 3x+21=90\implies 3x=69\implies x=\cfrac{69}{3}\implies x=23
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