Asaph Ho's answer to Gigi's Secondary 3 A Maths question.

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Asaph Ho
Asaph Ho's answer
18 answers (Tutor Details)
Use trigonometric identity. Solve for quadratic in tan x. But no range of x is given, so it is solved up to basic angle. Some possible values of x based on the basic angle are given there. note that x can also be negative if the range allows it.