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If sin7x = cos11x, 0 < x < 90^@, then t...

If sin7x = cos11x, ` 0 < x < 90^@`, then the value of tan9x is:
यदि sin7x = cos11x, `0^@

A

`sqrt3/2`

B

1

C

`1/sqrt3`

D

`sqrt3`

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