Eric Nicholas K's answer to Kathy's Secondary 4 A Maths Singapore question.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
1st
Looks like this.
syjiaxuan
Syjiaxuan
4 years ago
For (III) if u multiplied -1 to the LHS to make it -3sin2x, shouldn’t u multiply the RHS too? I think it should be
-3sin2x - 1.5 = -3x/pi
Eric Nicholas K
Eric Nicholas K
4 years ago
Well yes, I do make careless errors from time to time. Will update with a new diagram at a later time.
Eric Nicholas K
Eric Nicholas K
4 years ago
Kathy, I have updated the diagram.