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+1 vote
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in Trigonometry by (25.4k points)
let `f(x)=e^(cos^(-1)sin(x + pi/3))` then `f((8pi)/9) and f((-7pi)/4)`
A. `f((8pi)/9)=e^((5pi)/18)`
B. `f((8pi)/9)=e^((13pi)/18)`
C. `f(-(7pi)/4)=e^((pi)/12)`
D. `f(-(7pi)/9)=e^((11pi)/12)`

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