Kahwai's answer to MM's Secondary 4 A Maths Singapore question.
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For part 2
0
0<2X<2Pi()
Then
Differentiate y
You get something with cot(2X)
Equate both
Left with sine(2x) and cosine (2x)
Then using (a2+b2)^0.5 sin(theta + alpha) formula or sine square plus cosine square =1
You will get the answers
0
Then
Differentiate y
You get something with cot(2X)
Equate both
Left with sine(2x) and cosine (2x)
Then using (a2+b2)^0.5 sin(theta + alpha) formula or sine square plus cosine square =1
You will get the answers
Date Posted:
3 years ago