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The angle of a convex pentagon are theta...

The angle of a convex pentagon are `theta_1 lt theta_2 lt theta_3 lt theta_4 lt theta_5` then the value of `(sin(theta_1+theta_2))/(sin(theta_3+theta_4+theta_5)) +sin(theta_1+theta_2+theta_3)/(sin(theta_4+theta_5)` is

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