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Let theta1, be the angle between two lin...

Let `theta_1`, be the angle between two lines `2x+3y+c=0 and -x +5y+c, =0, and theta_2` be the angle betweentwo lines `2x + 3y +c=0 and -x +5y+c_1 = 0`, where `c_1, c_2, c_3`, are any real numbers : Statement-1: If `c_2 and c_3`, are proportional, then `theta_1 = theta_2` Statement-2: `theta_1=theta_2` for all `c_2 and c_3`.

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