MCQ
$\int_{}^{} {5\sin xdx = } $
- A$5\cos x + c$
- ✓$ - 5\cos x + c$
- C$5\sin x + c$
- D$ - 5\sin x + c$
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$2 x+y-z=3$
$x-y-z=\alpha$
$3 x+3 y+\beta z=3$
has infinitely many solution, then $\alpha+\beta-\alpha \beta$ is equal to .... .