2(cos^2) x=1 mohon bantuannya yaa
Matematika
Sitiliwuliyya
Pertanyaan
2(cos^2) x=1
mohon bantuannya yaa
mohon bantuannya yaa
1 Jawaban
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1. Jawaban ahreumlim
2 cos²x = 1
⇔ cos²x = 1/2
⇔ cos x = +-√(1/2)
⇔ cos x = 1/√2 ∨ cos x = -1/√2
⇔ x = 45° , 315° ∨ x = 135° , 225°