Question

If sin(x) = A, find the value of sin(2π - x).
My answers are A, -A, 2A and 1/2A. I think it's 2A, am I correct? Need help asap.

Answer 1

@ganeshie8 would you mind checking this for me? :)

Answer 2

sin(2pi -x) = sin(-x) = -sin(x) = -A

Answer 3

and you are correct yet again, smarty pants :) thank you so much @ganeshie8

Answer 4

If cos(x) = A, then cos (x + π)=

Answer 5

lets use this formula :
cos(A+B) = cosA cosB - sinA sin B

Answer 6

cos(x + pi) = cos(x) cos(pi) - sin(x) sin(pi)

Answer 7

see if u can simplify :)

Answer 8

it's -A again, right?

Answer 9

Yes !!

Answer 10

yay!!! last one? If tan(x) = N, then tan(x + π) =

Answer 11

il give a hint : period of tanx = pi

Answer 12

the value of tan repeats every pi,

so, tan(x + pi) = tan(x) = N

Answer 13

if that makes sense.. . :)

Answer 14

So would it just be N?

Answer 15

yes

Answer 16

yay!!! thank you sooo much, always appreciated :)

Answer 17

np.. you wlcme :)