Q. 8

# If sin θ1</s

Answer :

Given that sin θ1 + sin θ2 + sin θ3 = 3

We know that in general the maximum value of sin θ = 1 when θ = π/2

As sin θ1 + sin θ2 + sin θ3 = 3

θ1= θ2 = θ3 = π/2.

The above case is the only possible condition for the given condition to satisfy.

cos θ1 + cos θ2 + cos θ3

cos π/2 + cos π/2 + cos π/2

0+0+0

0.

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