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Continue reading# Month: May 2021

## cos a + cos b (formula and example) (sum of cosine)

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Continue reading## sin a + sin b (formula and example) (sum of sine)

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Continue reading## Quiz : what is the value of i^3 : complex numbers

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Continue reading## cos 3a (formula and example) (cosine of triple angle)

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Continue reading## sin 3a (formula and example) (sine of triple angle)

## Quiz : what is the value of i^2 : complex numbers

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