根据三倍角公式,可知sin(10度)是一元三次方程:
-4x^3+3x=1/2
的实数解。令p=-3/4, q=1/8, 则上述方程为
x^3+px+q=0.
其实数解为:
此即sin(10度)的精确值。
谁用matlab进一步化简一下该式子?
根据三倍角公式,可知sin(10度)是一元三次方程:
-4x^3+3x=1/2
的实数解。令p=-3/4, q=1/8, 则上述方程为
x^3+px+q=0.
其实数解为:
此即sin(10度)的精确值。
谁用matlab进一步化简一下该式子?
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