Question

Simplify using the sum and difference identities of cos(180-B)

Answer 1

ok it is cos180cosB-sin180sinb

Answer 2

-cosB-0sinB

Answer 3

so the answer is -cosB

Answer 4

Did you follow?

Answer 5

I used the wrong sign but it didn't matter but i will rewrite the equation so u won't follow my mistake

Answer 6

cos180cosB+sin180sinB

Answer 7

Yes Thank you so much, Im trying to help my brother and i havent done this gr 12 stuff in almost 10 yrs, thank you so much

Answer 8

alrighty gnite

Answer 9

gnite

Answer 10

and thank u again

Answer 11

np