Răspuns :

1DianaMaria3id

Explicație pas cu pas:

[tex]A∆ = \frac{AB \times AC \times \sin(A) }{2} \\ 15 = \frac{6 \times 10 \times \sin(A) }{2} \\ \frac{60 \times \sin(A) }{2} = 15 \\ 30 \sin(A) = 15 \\ \sin(A) = \frac{15}{30} {}^{(15} \\ \sin(A) = \frac{1}{2} [/tex]

A=30°

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