#can someone explain this to me

1 messages · Page 1 of 1 (latest)

wise glen
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its gonna be something to do with the angle CAB

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just work on it

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we know the area of the big triangle

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(AB * BC)/2

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for ABD we need to work out the area in terms of an angle

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use sine rule

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1/2 * AB * AD * sinA

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1/2 * AB * AD * sinA = 0.5 ((AB * BC)/2)

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re arrange for 2sinA
and ur g onna spot smth (a side ratio)

wise glen
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np