Eric Nicholas K's answer to chien's Secondary 4 A Maths Singapore question.
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We use a series of the double angle formula to do the proving.
The integral tan2 x cannot be integrated directly, so we have to use another identity to transform tan2x into the integrable sec2 x - 1.
The integral tan2 x cannot be integrated directly, so we have to use another identity to transform tan2x into the integrable sec2 x - 1.
Date Posted:
4 years ago
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