. Find the values of the unknowns which satisfy the following equations: a) (sin x, sin 2x, ln e) (sin 7,2 sin x, sec x) cos x b) 2(z² + jz,-j1,2z − 2, j) + j(jz − 2,3 − j1,−jz³,1) = (z²,1 + j1, z², j3) - - - c) (1, x, x², x) • (x,1, x, x²) = x³ + 6x

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