Question

If (cos○ + i sin○ )² = x+iy then show that x + y = 1​

Answer 1

Step-by-step explanation:

x+iy=

a−ib

a+ib

⇒(x+iy)(x−iy)=

(a−ib)

(a+ib)

×

(a+ib)

(a−ib)

⇒x

2

−(iy)

2

=

a

2

−(ib)

2

a

2

−(ib)

2

⇒x

2

+y

2

=

a

2

+b

2

a

2

+b

2

=1.

look at this attachment

make me brainlist

Answer 2

Step-by-step explanation:

this is your answer

please give thanks