The value of \( \sin^{-1} \left( \frac{2\sqrt{2}}{3} \right) + \sin^{-1 \left( \frac{1}{3} \right) \) is equal to:}
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Always check if the squares of the two arguments in a \( \sin^{-1} \) sum add up to 1. If \( a^2 + b^2 = 1 \), the answer is almost always \( \pi/2 \).