Penjelasan dengan langkah-langkah:
|a| = 6
|b| = 15
cos a = 0,7
a(a + b) = a² cos 0° + ab cos a
= 6² × 1 + 6 × 15 × 0,7
= 36 + 63
= 99
LaL = 6
LbL = 15
•Cos A = 0,7
= A ( a + b ) = a² cos 0° + ab cos a
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Penjelasan dengan langkah-langkah:
|a| = 6
|b| = 15
cos a = 0,7
a(a + b) = a² cos 0° + ab cos a
= 6² × 1 + 6 × 15 × 0,7
= 36 + 63
= 99
LaL = 6
LbL = 15
•Cos A = 0,7
• Hitung :
= A ( a + b ) = a² cos 0° + ab cos a
= 6² × 1 + 6 × 15 × 0,7
= 36 + 63
= 99