brittbritt1588 brittbritt1588

08-02-2024
Mathematics

contestada

The angle between two lines whose direction cosines l, m, n are given by l + m + n = 0 and mn - 6nl + 12l² = 0 is:
a. 30ᵒ
b. 45ᵒ
c. 60ᵒ
d. 90ᵒ

Respuesta :

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