Question

(1-tanx)^2=sec^2 x-2 tanx

Answer 1

ok!! now the left hand side
\[(1-tanx)^2 =1-2tanx+tan^2x=(1+tan^2x)-2tanx=sec^2x-2tanx\]

Answer 2

I go from the left hand side to the right hand side, that is the whole proof

Answer 3

I still dont understand the second part

Answer 4

which one?

Answer 5

how do you get the 1-2tanx+tan^2x

Answer 6

do you know \((a-b)^2 = a^2 -2ab +b^2\)

Answer 7

your a is 1
your b is tan x
just apply that expression

Answer 8

i wasnt taught that hold on let me think about it

Answer 9

Whaaaaat is wrong with your prof???

Answer 10

a, b can be anything!!! for trig, for number, for letter for something else

Answer 11

it's Virtual school so they miss things sometimes

Answer 12

ok, take your time to think about it. It's 1:00 am now. I go to bed now. Good luck

Answer 13

thank you so much! sorry for the bother... good night

Answer 14

omg i got it you're AWESOME!!!!!!!!!!!!!!!!!!!!!!!!