See Abel's answer to Royal Lim's Secondary 4 E Maths Singapore question

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Date Posted: 5 years ago

Royal Lim

5 years ago

U did wrongly.You not supposed to use radian

Abel

5 years ago

Method works, changing to dregree won't change final answer
Qn didn't restrict usage of rad, so I don't see an issue

Royal Lim

5 years ago

Ok sure