Question

Sina1 + sina2+ sina3=3 then find value of cosa1 + cosa2 + cosa3

Answer 1

Answer:

0

Step-by-step explanation:

Sina1 + sina2 + sina3 = 3

we know ,

sine maximum value= 1

so, above expression is correct only when , sina1 = sina2 = sina3 = 1

e.g a1 = a2 = a3 = 90°

but we know ,

cos90° = 0

so, cosa1 = cosa2 = cosa3 = 0

hence,

cos a1+cos a2+cos a3=0