Kahwai's answer to MM's Secondary 4 A Maths Singapore question.
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Make all becomes 2X
Cosec(2X) =1/Sin(2X)
Cos(4X) = cos (2.2X) therefore.... using double angle formula
Then can solve for part (1)
Quadratic equation
Cosec(2X) =1/Sin(2X)
Cos(4X) = cos (2.2X) therefore.... using double angle formula
Then can solve for part (1)
Quadratic equation
Date Posted:
3 years ago
Need steps please
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