Kahwai's answer to nancy's Secondary 4 A Maths Singapore question.
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1. When x is zero
Cos2X is zero
2X is pi()/2
X is pi()/4
Exp4X is exp(pi())
Get calculator to answer
2. Integration
Refer to text book
From 0 to pi()/4
Exp4x becomes 1/4 exp4x
Cos 2x becomes 1/2 sin2X
1/4 exppi() -1/4 - 1/2
Cos2X is zero
2X is pi()/2
X is pi()/4
Exp4X is exp(pi())
Get calculator to answer
2. Integration
Refer to text book
From 0 to pi()/4
Exp4x becomes 1/4 exp4x
Cos 2x becomes 1/2 sin2X
1/4 exppi() -1/4 - 1/2
Date Posted:
3 years ago
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