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The Laws of Sines and Cosines · Paper 2 — Free Maths AA SL Practice Questions

1MasterySAQ-SLaw of Sines and its applicationss6 marksPaper 2~9 min

A surveyor determines the width of a river. She stands at point

A

one bank and identifies two points,

B

and

C

, on the opposite bank. She measures

AB = 85\,\text{m}

, angle

B\hat{A}C = 62°

, and angle

A\hat{B}C = 48°

(a)

Calculate the length

BC

. [3 marks]

(b)

Determine the shortest distance from

A

to the line

BC

. [3 marks]

Solutions

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