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secondary 3 | E Maths
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putri
Putri

secondary 3 chevron_right E Maths chevron_right Singapore

helpp

Date Posted: 4 years ago
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Chua Yong Qi
Chua Yong Qi's answer
22 answers (Tutor Details)
1st
for (a), use cosine rule, since you know the angle opposite PR, as well as the length of the other 2 sides.

for (b), use sine rule, since you know the length of the side opposite angle PRQ, as well as another length and angle.

for (c), notice that PRM is a right-angled triangle, so just find angle PRM and use sine to find RM, then h.