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Find the principal value of cos^(-1)(-sq...

Find the principal value of `cos^(-1)(-sqrt3/2)`.

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To find the principal value of \( \cos^{-1}(-\sqrt{3}/2) \), we will follow a systematic approach: ### Step 1: Set up the equation Let \( y = \cos^{-1}(-\sqrt{3}/2) \). This implies that: \[ \cos(y) = -\frac{\sqrt{3}}{2} \] ...
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