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Question

If x=8cos3θ and y=8sin3θ, then x2/3+y2/3=
  1. 2
  2. 4
  3. 8
  4. 1

A
2
B
4
C
8
D
1
Solution
Verified by Toppr

The correct option is B 4
b'x2/3=82/3(cos3θ)2/3=4cos2θ
y3/2=82/3(sin3θ)2/3=4sin2θ
x2/3+y2/3=4(sin2θ+cos2θ)=4'

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