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Please do 3rd number its on the trigonometric equation

Please do 3rd number its on the trigonometric equation

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Grade:11

1 Answers

Aditya Gupta
2081 Points
5 years ago
i can see that the thiird question is quite tricky indeed. we need to OBSERVE that root3cosx+sinx
or root3cosx+sinx – 2however, root3cosx+sinx – 2 should be greater than zero for the under root sign to make sense.. so, root3cosx+sinx>=2. these both conditions can be true iff root3cosx+sinx=2
or sin(x+pi/3)=1=sin(pi/2)
or x= n*pi+(-1)^n*(pi/2) – pi/3

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