Ubalah titik berikut dalam koordinat cartesius A.(2,45*) B.(4,30*)

nomor a
[tex]x = r.cos \: 45 \\ = 2. \frac{1}{2} \sqrt{2} = \sqrt{2} [/tex]

[tex]y = r.sin \: 45 \\ = 2. \frac{1}{2} \sqrt{2} = \sqrt{2} [/tex]
nomor b
[tex]x = r.cos \: a \\ = 4.cos \: 30 \\ = 4. \frac{1}{2} \sqrt{3} = 2 \sqrt{3} [/tex]
[tex]y = r.sin \: 30 \\ = 4. \frac{1}{2} = 2 [/tex]