Eric Nicholas K's answer to universe's Secondary 4 A Maths Singapore question.
done
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Alternative idea, but I still do not like the final form. I find it ridiculous that this question made it to an exam paper (the font of the words used suggest that the question comes from an exam paper).
Date Posted:
4 years ago
Thankyou！！
We can use the tangent addition identity to solve the question easily.
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