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The value of the expression ((sin3theta)...

The value of the expression `((sin3theta)/(sintheta))^2-((cos3theta)/(costheta))^2,w h e ntheta=(7. 5)^0,` is
a. `4(sqrt(3)+1)`
b. `(sqrt(3)-1)`
c. `2(sqrt(6)+sqrt(2))`
d. `8/(sqrt(6)-sqrt(2))`

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