1.

Solve the system: x sin a + y sin 2a + z sin 3a = sin 4a x sin b + y sin 2b + z sin 3b = sin 4b x sin c + y sin 2c + z sin 3c = sin 4c

Answer»


ANSWER :x = 2 (cos a + cos b + cos c) + 8(cos a cos b cos c)
y = - 2 - 4(cos a cos b + cos c + cos b cos c)
Z = 2(cos a + cos b + cos c)


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