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

Explain how to set up the equation that you will solve.

Use that equation to solve for x.

User Imtiaz Abir
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1 Answer

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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
User MatthieuW
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