AP EAMCET Engineering 23 Apr 2019 Shift 1 Paper

Section: Mathematics

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Question : 10 of 160

Marks: +1, -0

if x +

1

x

= 2 sin α and y +

1

y

= 2 cos β , then x3y3+

1

x3y3

=

2 cos 3 (β - α)
2 cos 3 (β + α)
2 sin 3 (β - α)
2 sin 3 (β + α)

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