If \sin\left(x - \frac{\pi}{2}\right) = A\cos x, then \newline the number $A = $
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Step 1: Use the angle subtraction formula for sine to simplify sin(x-(π/2)): sin(x-(π/2)) = sin(x)cos(π/2) - cos(x)sin(π/2) sin(x-(π/2)) = sin(x)*0 - cos(x)*1 sin(x-(π/2)) = -cos(x) Show more…
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