If \[\int_{-a}^{a}{\sqrt{\frac{a-x}{a+x}}\,dx=k\pi ,}\] then \[k=\] [AISSE 1986; SCRA 1986]

If \[\int_{-a}^{a}{\sqrt{\frac{a-x}{a+x}}\,dx=k\pi ,}\] then \[k=\]

1.	If \[\int_{-a}^{a}{\sqrt{\frac{a-x}{a+x}}\,dx=k\pi ,}\] then \[k=\] [AISSE 1986; SCRA 1986]
A.	\[-a\]
B.	\[-2a\]
C.	\[2a\]
D.	\[a\]
Answer» E.

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If \[\int_{-a}^{a}{\sqrt{\frac{a-x}{a+x}}\,dx=k\pi ,}\] then \[k=\] [AISSE 1986; SCRA 1986]

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