Chen Dewei's answer to Nicky's Secondary 4 A Maths Singapore question.
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Last answer is 5pi/3. Just be very familiar with trigo identities so that you can manipulate them well. All the best!
Date Posted:
3 years ago
For (i) how did you get from the second step to the 3rd step??
Sin^2 + cos^2 = 1
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