Question

Express the complex number (3 + 5i)(2+6i) in the form a + ib.
cos(1+x)cos (-x)
11 Prove that
2​

Answer 1

Answer:

Answer:

(5i)(-3i/5) = (-5 * 3/5) * i * i

= -3 * i2

= -3 * (-1) [Since i2 = -1]

= 3