Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

done JEE Main Paper (Held On 11 April 2015) Total Questions - 1

• question_answer1) If \[\cos \alpha +\cos \beta =\frac{3}{2}\]and \[\sin \alpha +\sin \beta =\frac{1}{2}\]and \[\theta \]is the arithmetic mean of \[\alpha \] and \[\beta ,\] then \[\sin 2\theta +\cos 2\theta \]is equal to: [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[\frac{3}{5}\]
  done clear
  B)
  \[\frac{4}{5}\]
  done clear
  C)
  \[\frac{7}{5}\]
  done clear
  D)
  \[\frac{8}{5}\]
  done clear
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