if \text{\cos}\alpha+\text{\cos}\beta=3/2 and \text{\sin}\alpha+\text{\sin}\beta=1/2 and θ is the arithmetic mean of α and β,then \text{\sin}2\theta+\text{\cos}2\theta is equal to: [Main 11 Apr 2015]

JEE Main 11 April 2015 Paper

Section: Mathematics

Question : 88 of 90

Marks: +1, -0

if cosα+cosβ=

and sinα+sinβ=

and θ is the arithmetic mean of α and β,then sin2θ+cos2θ is equal to:

[Main 11 Apr 2015]

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