huien's answer to Kris's Secondary 3 A Maths Singapore question.
Thx for helping me! But there are more angles cos it's 0 to 180 degree (I think) I wish to know how to get all the other angles :( but again, thank you for your help
the other angle is 320, out of range
Oh ic.. But the other two are 80 and 160 according to the ans key (maybe it's wrong
oh, sry, i understyod wrongly.
then the ans are 40, 80 and 160, it would be easier to see if you draw the graph
then the ans are 40, 80 and 160, it would be easier to see if you draw the graph
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