1. Tardigrade
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  3. Mathematics
  4. Let fk(x) - (1/k) (sinkx + coskx) where x ∈ R and k ≥ 1. Then f4(x) -f6(x) equals

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Q. Let $ fk(x) - (1/k) (sin^kx + cos^kx) where x \in R and k \geq 1. Then f_4(x) -f_6(x) \,equals$

Solution:

Correct answer is (b) 1/12