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Maths-
General
Easy

Question

cos space theta equals 1 half open parentheses a plus 1 over a close parentheses text  then  end text cos text end text 3 theta equals K open parentheses a cubed plus 1 over a cubed close parentheses where  is equal to

  1. 1/2
  2. negative 1 half
  3. 1
  4. 3/2

The correct answer is: 1/2

    Cubing on both sides and applyc o s space 3 A equals 3 c o s space A minus 4 c o s cubed space A

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