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For 0 lt phi le ( pi )/( 2), if x = sum(...

For `0 lt phi le ( pi )/( 2)`, if `x = sum_(n=0)^(oo) cos^(2n) phi , y = sum_(n=0)^(oo) sin ^(2n) phi , z= sum _(n=0)^(oo) cos^(2n) phi sin ^(2n ) phi`, then

A

xyz =xy` +` y

B

`xyz = xy +z`

C

`xyz = x+y+z`

D

`xy^(2) = y^(2) + x`

Text Solution

Verified by Experts

The correct Answer is:
A, B
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