Jawab:
Sehingga :
Jadi Hp penyelesaian :
Penjelasan dengan langkah-langkah:
1. Memotong Sumbu x, Sehingga f(x) =0
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Jawab:
Sehingga :![cos2x=cos60\\2x=60+k.360 \to x=30+k.180 \to x=30,210\\2x=-60+k.360 \to x=-30+k.180 \to x=150,330 cos2x=cos60\\2x=60+k.360 \to x=30+k.180 \to x=30,210\\2x=-60+k.360 \to x=-30+k.180 \to x=150,330](https://tex.z-dn.net/?f=cos2x%3Dcos60%5C%5C2x%3D60%2Bk.360%20%5Cto%20x%3D30%2Bk.180%20%5Cto%20x%3D30%2C210%5C%5C2x%3D-60%2Bk.360%20%5Cto%20x%3D-30%2Bk.180%20%5Cto%20x%3D150%2C330)
Jadi Hp penyelesaian :![{30^{0},150^{0},210^{0},330^{0}} {30^{0},150^{0},210^{0},330^{0}}](https://tex.z-dn.net/?f=%7B30%5E%7B0%7D%2C150%5E%7B0%7D%2C210%5E%7B0%7D%2C330%5E%7B0%7D%7D)
Penjelasan dengan langkah-langkah:
1. Memotong Sumbu x, Sehingga f(x) =0
Jawab:
Penjelasan dengan langkah-langkah: