avii7
25.11.2019 •
Mathematics
Solve the equation! 3 tan^3θ = tan θ
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Ответ:
3 tan³ t - tan t = 0
tan t ( 3 tan² t - 1 ) = 0
tan t = 0
t 1 = k π , k ∈ Z
3 tan ² t - 1 = 0
3 tan ² t = 1
tan ² t = 1/3
tan t = +/- √3/3
t 2 = π / 6 + k π
t 3 = - π / 6 + k π , k ∈ Z
Ответ:
Step-by-step explanation:
The lengths of the sides are 3x, 2x, 4x.
perimeter = 3x + 2x + 4x = 120 mm
9x = 120 mm
x = 40/3 = 13⅓ mm
Sides: 40 mm, 26⅔ mm, 53⅓ mm
Obtuse triangle.