Solve 11 no. Please..

Dear Student,

Please find below the solution to the asked query:

sinθ1+sinθ2+sinθ3=3   , 0°<θ1,θ2 , θ390°As we know Sin has maximum value 1So there is only one possibility that is 1+1+1=3Hence θ1=θ2=θ3=1Socosθ1+cosθ2+cosθ3cos90°+cos90°+cos90°0+0+00      Answer

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