Question

Tolong dibantu ya ka sama penjelasan nya​

Answer 1

Jawab:

Penjelasan dengan langkah-langkah:

cos π/4 = (1.1+(-2).0)+n.1)/√(1²+(-2)²+n²)x((1²+1²)

1/2√2 = (1+n)/√(5+n²)√2

2/2 = (1+n)/√(5+n²)

√(5+n²)=1+n

5+n² = 1 + 2n +n²

4 = 2n

n = 4/2

n = 2