Range of the function f(x) = cos (K sinx) is (-1,1), then the positive integral value of K can be ______.
ABC , 6 Years ago
Grade 11
Algebra> Range of the function f(x) = cos (K sinx)...
1 Answers
Aditya Gupta
Last Activity: 6 Years ago
Obviously ksinx lies in between-k and k.
Therefore cosine of ksinx lies in between cosk and cos0= 1. So we want cos k to be -1. So k is pi. But k is integral. So one of the possible values of k is 4.
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