Lim Xuan Kai's answer to coral's Secondary 4 A Maths Singapore question.
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Cos-1 both sides to get thether-25.6=cos-1(3/square root 180)
Thtether=cos-1(3/square root 180)+25.6
Thtether=cos-1(3/square root 180)+25.6
Date Posted:
3 years ago
thank you!!
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