Hi i have question

tanx - cotx / tanx + cotx + 1 = 2sinx

so...

sin/cos - cos/sin / sin/cos + cos/sin

then mutlple fracs and get

sin^2x - cos ^2x/ sinxcosx / sin^2x + cos^2x/ sinxcosx

and then what do i do?

Printable View

- Nov 9th 2008, 06:41 PMcokeclassicTrig identities help
Hi i have question

tanx - cotx / tanx + cotx + 1 = 2sinx

so...

sin/cos - cos/sin / sin/cos + cos/sin

then mutlple fracs and get

sin^2x - cos ^2x/ sinxcosx / sin^2x + cos^2x/ sinxcosx

and then what do i do? - Nov 9th 2008, 06:58 PMChop Suey
Is this your question?

I'm going to assume that the left hand side is written correctly, but I'm going to ask you to recheck the right hand side.

After this step:

We get:

Recall that

Therefore:

- Nov 9th 2008, 07:07 PMcokeclassic
- Nov 9th 2008, 07:20 PMChop Suey
- Nov 9th 2008, 07:28 PMcokeclassic
Ok I see.... thanks...

so basically

sin^2 + cos^2/ sin^2 + cos^2 is the same as

sin^2 + cost ^2 since it equal 1 - Nov 9th 2008, 07:32 PMChop Suey

But I think you might have made a typo and meant instead:

In that case, yes, it equals since - Nov 9th 2008, 07:39 PMcokeclassic
Er yeah, ty