What is the modulus of the complex number #z=3+3i#? Precalculus Complex Numbers in Trigonometric Form Trigonometric Form of Complex Numbers 1 Answer George C. Jun 19, 2015 #abs(3+3i) = sqrt(3^2+3^2) = sqrt(3^2*2) = 3sqrt(2)# Explanation: In general #abs(a+ib) = sqrt(a^2+b^2)# Answer link Related questions How do I find the trigonometric form of the complex number #-1-isqrt3#? How do I find the trigonometric form of the complex number #3i#? How do I find the trigonometric form of the complex number #3-3sqrt3 i#? How do I find the trigonometric form of the complex number #sqrt3 -i#? How do I find the trigonometric form of the complex number #3-4i#? How do I convert the polar coordinates #3(cos 210^circ +i\ sin 210^circ)# into rectangular form? What is DeMoivre's theorem? How do you find a trigonometric form of a complex number? Why do you need to find the trigonometric form of a complex number? Why is a number raised to a negative power the reciprocal of that number? See all questions in Trigonometric Form of Complex Numbers Impact of this question 10202 views around the world You can reuse this answer Creative Commons License