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This month:
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Stage 4&5
Complex Sine
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Stage: 5 Challenge Level:
One method is to use the formula $$\sin z = {1\over 2i}(e^{iz} - e^{-iz})$$ substitute $w=e^{iz}$ and solve for $w$.
Complex numbers
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Surds
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chemistry
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Mathematical reasoning & proof
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Golden ratio
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Long problems
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Logarithmic functions
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Exponential series
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Quadratic equations
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Sine
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Published October 2004.
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