Mathematics · Oct / Nov 2022 · Paper 21 · Question 18
0580
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NOT TO SCALE 115° 35° 7 cm A C B Calculate the length BC. BC = cm [4]
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12.7 or 12.68 to 12.69 [4]
M3 for 7sin115 − − sin(180 115 35)
or B2 for 8.03… seen OR
B1 for [angle C =] 30 7sin115
M2 for C sin( their angle )
or M1 for sin115 sin( their angle ) C = oe BC 7
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