Answer :

lets start by graph the first vector and the given one:

In this case the angle is:

[tex]135^{\circ}=\frac{3\pi}{4}[/tex]

And for the last one:

[tex]270^{\circ}=\frac{6\pi}{4}=\frac{3\pi}{2}[/tex]

${teks-lihat-gambar} TrequanD201098
${teks-lihat-gambar} TrequanD201098

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