grace9874
23.03.2020 •
Mathematics
Trigonometry
Trigonometric Equations
0 ≤ x ≤ 2 π , solve the equation Cos 2θ= √ 2/2
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Ответ:
θ = π/8, 7π/8, 9π/8, 15π/8
Step-by-step explanation:
cos 2θ= √ 2/2
basic angle = π /4
2θ= π/4
2π - π/4 = 7π/4,
π/4 + 2π = 9π/4,
7π/4 + 2π = 15π/4
θ = π/8, 7π/8, 9π/8, 15π/8
Ответ:
51 ÷ (-17)
-3 is the answer