1.

If a = Cos theta - Sin theta, b = Cos^(3) theta - Sin^(3) theta, then

Answer»

`a^(3)-3a+2b=0`
`a^(3)+3a-2b=0`
`a^(3)-3a-2b=0`
`B^(3)-3a+2b=0`

ANSWER :A


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