0^(@) और 90^(@) के बीच सभी prop(i) (i = ...

`0^(@)` और `90^(@)` के बीच सभी `prop_(i) (i = 1, 2, 3, .......... 20)` के लिए दिया गया है कि, `cos prop_(1), + cos prop_(2) + cos prop_(3) + .... + cos prop_(20) = 20` तो `(prop_(1) + prop_(2) + prop_(3) + ... + prop_(20))` का मान क्या है ?

A

A)`900^(@)`

B

B)`1800^(@)`

C

C)`0^(@)`

D

D)`20^(@)`

लिखित उत्तर

Verified by Experts

The correct Answer is:

C

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