Trig proof problem

Alexeia

New member
Joined
Mar 24, 2015
Messages
5
Hi,

I need to proof the following equation is true, e.g. that the left hand side is equal to the right hand side.

(sin2(360 - x) + cos(90 + 2x) + cos2(180 - x)) / (sin(90 - 2x)) = (cosx -sinx) / (cosx + sinx)



I only got this and can't go further:

(-sin2x-1) / (1 - sin2x)

Any help please.

ps. sorry for messy typing, dunno how to type fractions on this forum..
 
I need to [prove] the following [identity] is true....

(sin2(360 - x) + cos(90 + 2x) + cos2(180 - x)) / (sin(90 - 2x)) = (cosx -sinx) / (cosx + sinx)

I only got this and can't go further:

(-sin2x-1) / (1 - sin2x)
How did you arrive at the above? For which side is this your simplification / rearrangement?

When you reply, please show all of your steps. Thank you! ;)
 
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