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Given both thetaa n dvarphi are acute an...

Given both `thetaa n dvarphi` are acute angles and `sinalphabetagamma=1/2,cosvarphi=1/3,` then the value of `theta+varphi` belongs to `(pi/3,pi/2)` (b) `(pi/2,(2pi)/3)` (c) `((2pi)/3,(5pi)/6)` (d) `((5pi)/6,pi)`

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