(Cos 60° - tan 45°)×(cos 30° + tan 45°)
Matematika
tifanirf70
Pertanyaan
(Cos 60° - tan 45°)×(cos 30° + tan 45°)
1 Jawaban
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1. Jawaban izzaTizza
[tex] (cos60-tan45)X(cos30+tan45)\\ \\=(\frac{1}{2}-1)X( \frac{1}{2} \sqrt{3}+1)= \frac{1}{4} \sqrt{3} + \frac{1}{2}- \frac{1}{2} \sqrt{3}-1=- \frac{1}{4} \sqrt{3} - \frac{1}{2} [/tex]