2 sin ( 45° + α ) cos ( 45° - α ) = ....
Matematika
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Pertanyaan
2 sin ( 45° + α ) cos ( 45° - α ) = ....
1 Jawaban
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1. Jawaban Bobb123
= 2 sin ( 45 + a ) cos ( 45 - a )
= 2 sin a cos a