QUESTION IMAGE
Question
$\frac{\sin a}{13} = \frac{\sin115}{29}$
Step1: Despejar $\sin A$
Multiplicar ambos lados por 13.
$\sin A = \frac{\sin(115^\circ) \times 13}{29}$
Step2: Calcular $\sin(115^\circ)$
$\sin(115^\circ) = \sin(180^\circ - 65^\circ) = \sin(65^\circ) \approx 0.9063$
Step3: Sustituir y calcular $\sin A$
$\sin A \approx \frac{0.9063 \times 13}{29} = \frac{11.7819}{29} \approx 0.4063$
Step4: Calcular ángulo $A$
Aplicar función seno inverso.
$A \approx \arcsin(0.4063) \approx 23.97^\circ$
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$A \approx 24^\circ$ (o $\sin A \approx 0.406$ si se pide solo el valor del seno)