哪位大神会算这道题!!大神求解!!必有重谢
1个回答
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解析:
(1)求导
(lncosx)'
=(1/cosx)●(cosx)'
=(1/cosx)●(-sinx)
=-tanx
(2)
F(x)
=∫(tanx-x)dx
=-(lncosx)+(1/2)x²+C
S
=F(π/4)-F(0)
=[(1/2)(π/4)²-ln(√2/2)]-0
=π/32+ln2/2
=(π+16ln2)/2
(1)求导
(lncosx)'
=(1/cosx)●(cosx)'
=(1/cosx)●(-sinx)
=-tanx
(2)
F(x)
=∫(tanx-x)dx
=-(lncosx)+(1/2)x²+C
S
=F(π/4)-F(0)
=[(1/2)(π/4)²-ln(√2/2)]-0
=π/32+ln2/2
=(π+16ln2)/2
追答
~~~~~~
sorry,笔误
解析:
(2)
F(x)
=∫(tanx-x)dx
=-(lncosx)-(1/2)x²+C
S
=F(π/4)-F(0)
=[-(1/2)(π/4)²-ln(√2/2)]-0
=-π/32+ln2/2
=(16ln2-π)/32
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