Tan Hui Juan's answer to glittr's Secondary 4 A Maths Singapore question.
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Check your differentiation or whether u change to rad mode in your calculator.
Date Posted:
4 years ago
It’s -6 cos 3x sin 3x. You missed out a negative sign.
Having said that, the missing negative sign should not affect the solution.
Having said that, the missing negative sign should not affect the solution.
hi i checked the mode and used online diff calculator to confirm . but still get calculator error . can help pls
hi all , thanks for input . i just realised i uploaded the wrong qn . pls help see latest pic :)
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