Question

@AZ for number 5, idek at all?

Answer 1

the question

Answer 2

ye

Answer 3

remember the identity I told you about?

cos^2 (x) + sin^2 (x) = 1

what do you get if you solve for cos^2 (x)

and then plug that in on the left hand side

Answer 4

but the right says 2sin^2 y? not 1

Answer 5

it says

1 - 2 sin^2 (y)

Answer 6

you need to solve for cos^2 (x) in the identity and plug it in

Answer 7

i don't understand

Answer 8

cos^2 x = 1-sinx^2 x
but it says 1-2sin^2 x
how do i plug that in

Answer 9

you're getting confused between 2 sin(x) and sin^2 (x)

two different things

sin * sin gets you sin^2

sin + sin will get you 2 sin

Answer 10

so yes cos^2 = 1 - sin^2

and so we go from

cos^2 - sin^2

and plugging in 1 - sin^2

what would you get

1 - sin^2 (x) - sin^2 (x)

Answer 11

imagine sin^2(x) as a

1 - a - a =

Answer 12

oh

Answer 13

oh, kay, one sec

Answer 14

kay, done, thanksssssssssssssssssssssss

Answer 15

no problem :)

Answer 16

<3
heh, kek