Arnold K H Tan's answer to help's Secondary 4 A Maths Singapore question.
done
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Don't overthink the question...
Date Posted:
2 years ago
but i thought some part when its for eg cos x(sinx +1) = 0 the cos x is not supposed to be removed ? when to remove such ?
Not to be removed if its already part of the equation/question. You introduced the term by changing the sine term to a combination of tangent and cosine - you should not have.
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