October 2018 1 12 Report
Jika tan 15° = a, nilai dari tan 255°-tan 105° ÷ tan 195°+tan 105° = .....
a. 2÷a²-1
b. 1÷a²-1
c. a÷a²-1
d. 2÷a-1
e. 1÷a-1
Tolong penyelesaiannya
*÷ istilahnya per.

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