Ching Ziwei's answer to Chowder's Junior College 1 H1 Maths question.
Wait i dont understand . How do you know its sin2x? Is it a formula kind of thing ? Please do step by step cos i really dont understand
Formula list given during exams:
sin 2A ≡ 2 sin Acos A
Your aim is to make it into either sin or cos only so that it becomes simple integration
sin 2A ≡ 2 sin Acos A
Your aim is to make it into either sin or cos only so that it becomes simple integration
But why do you have to minus 1 ? I dont understand the second last and third part
Can i use integration by parts or special integration for this Q
Hi u there ? Is it possible ti use integration by parts or special integration to solve these?
cos2A = 2cos^2(A) - 1 (formula sheet)
You wanna avoid integration by parts as much as possible. It's the most tedious integration. Always try to simplify
You wanna avoid integration by parts as much as possible. It's the most tedious integration. Always try to simplify
When you have double angle, always refer back to formula sheet. I was also very weak in this until I slowly practice and learn to identify all these conversion of formula using formula sheet.
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