Hello, can someone help me with these two questions please:
(a) Prove: cotx - tanx = 2cot2x
(b) Prove 2tanx / (1 + tan(^2)x = sin2x
Thank you so much in advance!
Edit: and this question too please:
Prove (cosecA + cotA)^2 = 1 + cosA / 1 - cosA
I'd probably start with the RHS for (a). And the LHS for (b). Where tanx is involved, I might be tempted to express it interms of sinx and cosx and when it's squared, I'd think about what links tan2x and 1.
I'd probably start with the RHS for (a). And the LHS for (b). Where tanx is involved, I might be tempted to express it interms of sinx and cosx and when it's squared, I'd think about what links tan2x and 1.
Do you really have no idea? Try and compare what you have to the other side. Hopefully, it should jump out at you. It'll be helpful for you to remember that c+da−b=c+da−c+db.
Do you really have no idea? Try and compare what you have to the other side. Hopefully, it should jump out at you. It'll be helpful for you to remember that c+da−b=c+da−c+db.
Oh yeah, sorry! that was really stupid of me! haha thank you so much for your help though. Also would you help me on part c? (first post, edit)
Is part (c) (cosecA+cotA)2=1−cosA1+cosA? If so, I don't think it matters which side you start from. Both are a little tricky. Might want to do a bit of both.
Is part (c) (cosecA+cotA)2=1−cosA1+cosA? If so, I don't think it matters which side you start from. Both are a little tricky. Might want to do a bit of both.
Yeah, that's part (c) And oh. Would I annoy you if I asked you to start me off? I am so sorry for being such a pain and thank you for your kindness