Application of DerivativeHard

Question

Indicate the correct alternative (s), for
0 < φ , if x = cos²ⁿ φ, y = sin2n φ and z = cos²ⁿφ sin²ⁿφ, then -

Options

A.xyz = xz + y

B.xyz = xy + z

C.xyz = x + y + z

D.xyz = yz + x

Solution

x =
y =
z =
above equation satisfy option (B) & (C).

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