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If P,Q,R are angles of an isosceles tria...

If P,Q,R are angles of an isosceles triangle and `anglep=pi/2` then the value of `(cos(p/3)-isin(p/3))^3+(cosQ+isinQ)(cosR-isinR)+(cosP_isinP)(cosQ-IsinQ)(cos R-isin R)` is equal to

A

i

B

(-i)

C

1

D

(-1)

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B
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