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Geometry Level 2

If 0 ≤ x i ≤ 90 0\le x_{i} \le 90 where i i is positive integer and sin ⁡ ( x 1 ) + sin ⁡ ( x 2 ) + sin ⁡ ( x 3 ) = 3 \sin(x_{1})+\sin(x_{2}) + \sin(x_{3})=3

Find cos ⁡ ( x 1 ) + cos ⁡ ( x 2 ) + cos ⁡ ( x 3 ) \cos(x_{1})+\cos(x_{2})+\cos(x_{3})


The answer is 0.

Department 8 by Department 8 , 27, Israel

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1 solution

Raj Rajput
Jul 27, 2015

7 Helpful 0 Interesting 0 Brilliant 0 Confused

Exactly. same solution:)

Mehul Arora - 5 years, 10 months ago

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