Stacy Yu Ning Xin's answer to Janice Phua's Secondary 4 A Maths question.

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Stacy Yu Ning Xin
Stacy Yu Ning Xin's answer
1 answers (Tutor Details)
1st
5c) is rather straight forward - you consider the maximum value of the cosine function and its corresponding angle

5d) sub 7 as AD into the equation in 5b