Eric Nicholas K's answer to Kathy's Secondary 4 A Maths Singapore question.
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Practise Now 13 Q2
Date Posted:
5 years ago
For 2a the answer should be 1.99 and 4.30
Ya it is in red ink
But why u canceled the cos x on top
Because the value computed for the square root is not within the range -1 to 1
In other words, there is no solution of x for cos x > 1
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