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Functions (XII)

Question

If f(x)=cos2x+sin4xsin2x+cos4x for xR then f(2018)=

Easy
Solution

f(x)=cos2x+sin2x1cos2xsin2x+cos2x1sin2x=1 f(x) is constant funciton f(2018)=1



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Similar Questions

Which of the following statements are incorrect?

 I. If f(x) and g(x) are one-one then f(x)+g(x) is also one-one

 II. If f(x) and g(x) are one-one then f(x)g(x) is also one-one

 III. If f(x) is odd then it is necessarily one-one. 


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