Maths-
General
Easy

Question

he smallest plus v e blank x satisfying the equation log subscript cos invisible function application x end subscript invisible function application sin invisible function application x plus log subscript sin invisible function application x end subscript invisible function application cos invisible function application x equals 2 is

  1. pi divided by 2  
  2. pi divided by 3  
  3. pi divided by 4  
  4. pi divided by 6  

The correct answer is: pi divided by 4


    Let log subscript cos invisible function application x end subscript invisible function application sin invisible function application x equals t comma blankthen the given equation is t plus fraction numerator 1 over denominator t end fraction equals 2
    rightwards double arrow open parentheses t minus 1 close parentheses to the power of 2 end exponent equals 0 blank rightwards double arrow t equals 1 blank rightwards double arrow log subscript cos invisible function application x end subscript invisible function application sin invisible function application x equals 1 or sin invisible function application x equals cos invisible function application x blank rightwards arrow tan invisible function application x equals 1
    rightwards double arrow x equals pi divided by 4

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