Question

math help

Answer 1

\((1+cosx)(secx-1)=?\)

Answer 2

Hint: when proving identities, you leave one side alone while you alter the other side

Answer 3

you want to make one side look like the other not combine them.

Answer 4

secx -1 + cosx*secx - cosx
secx -1 +1 -cosx
secx - cosx

Answer 5

(secx+1)(1-cosx)=secx-secxcosx+1-cosx
secx-1+1-cosx
secx-cosx

looks equivalent to me

Answer 6

yes but performing cross multiplication is not how you prove an identity

Answer 7

I didn't word the question that way

Answer 8

well cross multiplication of the identities to be proven