Calvin Wong Tuition's answer to Priya's Secondary 4 A Maths Singapore question.
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Date Posted:
3 years ago
Think again...
What happens if cos 2x is converted into “1 - 2 sin^2 x” instead?
What happens if cos 2x is converted into “1 - 2 sin^2 x” instead?
And you missed out a “1/2” at the end...
Oh, yes. U r right
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