NDA Math Trigonometric Ratios of Angles and Equations

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Question : 32 of 100
 
Marks: +1, -0
If cos‌α+cos‌β+cos‌γ=0,where
0<α≤‌‌
Ï€
2
,0<β≤‌‌
Ï€
2
,0<γ≤‌‌
Ï€
2
, Then what is the value of sin‌α+sin‌β+sin‌γ ?
[NDA I 2018]
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