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∫√( a^2- x^2) dx=什么?
- 答：a^2-x^2 =a^2-a^2sint^2 =a^2cost^2 ∫√（a^2-x^2）dx =∫acost*acostdt =a^2∫cost^2dt =a^2∫（cos2t+1）/2dt =a^2/4∫(cos2t+1)d2t =a^2/4*(sin2t+2t)将x=asint代回，得：∫√（a^2-x^2）dx=x√(a^2-x^2)/2+a^2*arcsin(x/a)/2+C（C为常数...
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2024-05-20
回答者: 风林网络手游平台
1个回答
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如何计算不定积分√( a^2- x^2)
- 答：a^2-x^2 =a^2-a^2sint^2 =a^2cost^2 ∫√（a^2-x^2）dx =∫acost*acostdt =a^2∫cost^2dt =a^2∫（cos2t+1）/2dt =a^2/4∫(cos2t+1)d2t =a^2/4*(sin2t+2t)将x=asint代回，得：∫√（a^2-x^2）dx=x√(a^2-x^2)/2+a^2*arcsin(x/a)/2+C（C为常数...
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2024-05-13
回答者: 风林网络手游平台
1个回答
