求解一道高数题

如题所述

解:
令x=sint,则dx=cost dt
∫(√2/2→1)√(1-x²)/x²dx
=∫(π/4→π/2)cost/sin²t·costdt
=∫(π/4→π/2)cos²t/sin²t dt
=∫(π/4→π/2)cot²t dt
=∫(π/4→π/2)(csc²t-1) dt
=(-cot²t-t)|(π/4→π/2)
=-π/2-(-1-π/4)
=1-π/4
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