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I : int(0)^(a)sqrt(a^2-x^(2))dx=pia^(2) ...

I : `int_(0)^(a)sqrt(a^2-x^(2))dx=pia^(2)`
II : `int_(0)^(pi//4)(tan^(4)x+tan^(2)x)dx=1`

A

only I is true

B

only II is true

C

both I and II are true

D

neither I nor true

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