Eric Nicholas K's answer to AX's Secondary 3 A Maths Singapore question.
done
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Something like this would be good
Date Posted:
4 years ago
480° shouldn't be there
I put the 480 there to show that without the 0 to 360 stipulation, the angles can go beyond 360.
I guessed as much. Anyway students are expected to know the periodic nature of the trigo functions.
However for presentation purposes, it is best to avoid writing that and the '...' especially for the last line, because it would suggest to the marker that x goes on periodically and 480° is one of the solutions. Presentation wise, only answers in the range should be given.
AX, do take note.
However for presentation purposes, it is best to avoid writing that and the '...' especially for the last line, because it would suggest to the marker that x goes on periodically and 480° is one of the solutions. Presentation wise, only answers in the range should be given.
AX, do take note.
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