If sqrt(5)tantheta= 5sintheta then what ...

If `sqrt(5)tantheta= 5sintheta` then what is the value of `(sin^(2)theta-cos^(2)theta)` ?

A

A)`3//5`

B

B)`1//5`

C

C)`4//5`

D

D)`2//5`

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The correct Answer is:

A

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