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Let varphi,phi in [0,2pi] be such that 2...

Let `varphi,phi in [0,2pi]` be such that `2costheta(1-sinphi)=sin^2theta(tantheta/2+cottheta//2)"cos"phi-1,"tan"(2pi-theta)>0` `and −1<"sinθ"< −sqrt3/2 ` then φ lies between

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