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AP EAMCET · Maths · Inverse Trigonometric Functions

The domain of \(f(x)=\cos ^{-1}\left(\frac{x-3}{2}\right)-\log _{10}(4-x)\) is

  1. A \((1,4)\)
  2. B \([1,4)\)
  3. C \((1,4]\)
  4. D \([1,4]\)
Verified Solution

Answer & Solution

Correct Answer

(B) \([1,4)\)

Step-by-step Solution

Detailed explanation

Let \(f(x)=\cos ^{-1}\left(\frac{x-3}{2}\right)-\log _{10}(4-x)\) For domain of \(\log _{10}(4-x) \Rightarrow 4-x > 0 \Rightarrow x < 4\) For domain of \(\cos ^{-1}\left(\frac{x-3}{2}\right) \Rightarrow-1 \leq \frac{x-3}{2} \leq 1\) \(\Rightarrow \quad 1 \leq x \leq 5\) Now…