what is the trigonometric form of (-1+4i)???

z = (-1+4i)

Algebraic form:
z = -1+4i

Exponential form:
z = 4.1231056 × ei 104°2'10″

Trigonometric form:
z = 4.1231056 × (cos 104°2'10″ + i sin 104°2'10″)

Polar form:
r = |z| = 4.12311
φ = arg z = 104.03624° = 104°2'10″ = 0.57798π