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secondary 2 | Maths
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btsisgr8
Btsisgr8

secondary 2 chevron_right Maths

for part (b) why does sin have to be used instead of tan or cos ??

Date Posted: 6 years ago
Views: 529
Lew Xin Ying
Lew Xin Ying
6 years ago
Hi, i think think it's because u does not know Length of AN. (Toa cah Soh remember?) So thus you only is able to use sine or cosines rule for non right angle triangle. Hopes this helps. :) cosines rule for non right angles triangle cannot be use as u does not know the length of CB
btsisgr8
Btsisgr8
6 years ago
thank u !!! :D

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Henry
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btsisgr8
Btsisgr8
6 years ago
thank u !! :D