For all alpha.i s, (i=1,2,3............2...

For all `alpha._i s, (i=1,2,3............20)` lying between `0^@` and `90^@`, it is given that `sin alpha_1+ sin alpha_2+ sin alpha_3...........sin alpha_20=20`.What is the value (in degrees) of `(alpha_1+ alpha_2+alpha_3.......alpha_20)` ?
`0^@` से `90^@` के बीच स्थित सभी `alpha._i s, (i=1,2,3............20)` के लिए, यह दिया गया है कि `sin alpha_1+ sin alpha_2+ sin alpha_3...........sin alpha_20=20` है | `(alpha_1+ alpha_2+alpha_3.......alpha_20)` का मान (डिग्री में) ज्ञात करें |

1800

900

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