Cos 35°cos10°-sin 35° sin 10°
Matematika
nursabrina677
Pertanyaan
Cos 35°cos10°-sin 35° sin 10°
1 Jawaban
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1. Jawaban ahreumlim
cos(a + b) = cos a . cos b - sin a . sin b
a = 35
b = 10
Cos 35°cos10°-sin 35° sin 10°
= cos(35° + 10°)
= cos 45°
= (1/2)√2