Let `"f(x)"=(sin(x-a)+sin(x+a))/(cos(x-a)-cos(x+a)),` then-A. `f(x+2pi)=f(x)"but f"(x+alpha)nef(x)"for any"0ltalphalt2pi`B. f is strictly increasing functionC. f is strictly decreasing functionD. f is constant function

Let `"f(x)"=(sin(x-a)+sin(x+a))/(cos(x-a)-cos(x+a)),` then-A. `f(x+2pi

1.	Let `"f(x)"=(sin(x-a)+sin(x+a))/(cos(x-a)-cos(x+a)),` then-A. `f(x+2pi)=f(x)"but f"(x+alpha)nef(x)"for any"0ltalphalt2pi`B. f is strictly increasing functionC. f is strictly decreasing functionD. f is constant function
Answer» Correct Answer - D `f(x)=(sin(x-a)+sin(x+a))/(cos(x-a)-cos(x+a))=(2sin(x).cosa)/(2sinx.sina)=cota`

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Let `"f(x)"=(sin(x-a)+sin(x+a))/(cos(x-a)-cos(x+a)),` then-A. `f(x+2pi)=f(x)"but f"(x+alpha)nef(x)"for any"0ltalphalt2pi`B. f is strictly increasing functionC. f is strictly decreasing functionD. f is constant function

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