What is the trigonometric form of $(-1+5i)$ ?

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Answer 1 · 2016-02-22T05:08:17

1 / $sqrt$ 26 ( cos (101.31 deg) + i sin (101.31 deg ) ), nearly.

r = 1 / $sqrt$ 26. $theta$ is from cos $theta$ = $-$ 1 / $sqrt$ 26 and sin $theta$ = 5 / $sqrt$ 26.

What is the trigonometric form of (-1+5i) (-1+5i) ?