Question

Помогите решить тригонометрию

Answer 1

А)
cos3x(cos3x - cos5x) = 0
cos3x ·(- 2) · sin4x · sin(-x) = 0
cos3x · sin4x · sinx = 0
cos3x = 0          или      sin4x = 0          или          sinx = 0
3x = π/2 + πn                4x = πk                            x = πm
x = π/6 + πn/3                x = πk/4
б) sin5x(sinx - sin5x) = 0
sin5x · 2 · sin(-2x) · cos3x = 0
sin5x ·  sin2x · cos3x = 0
cos3x = 0          или      sin2x = 0          или          sin5x = 0
3x = π/2 + πn                2x = πk                            5x = πm
x = π/6 + πn/3                x = πk/2                          x = πm/5

Answer 2

Trigonometry Help

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