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C (704, 5714) @netf(x)= x2ー2./(sinJ3-sin...

C (704, 5714) @netf(x)= x2ー2./(sinJ3-sin./2)--(cos,f-cos./2) Let/(X)=x2-21/snV3-sin./2) x-(cos/3-cos./2) 13. 13. then a. (x) is positive Vx E IR b. /(x) assumes both positive and negative values c. fx) 0 has no real roots d, y=f(x) touches the line y-0 14 6. For α= ㎡7 which of the following hold(s) good?

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