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[CIE] All Pure Mathematics (P1, P2 and P3) doubts here !

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Arthur Bon Zavi:
You are right DK.







 :'(



(1 + sin x) and (1 + sin x) cancel out.

Therefore :



Proved the Identity :

Arthur Bon Zavi:
Prove the Identities :

(i)


(ii)

After trying much, I didn't get !

Alpha:
1) (1+tan^2 x)/ tan x = sec^2 x/ tan x

                              = 1/ cos^2 x * (cos x/ sin x)
                              = 1/ cos x sin x

Check the second part too... I think there should be a double angle somewhere.

Arthur Bon Zavi:

--- Quote from: ~Alpha on November 14, 2010, 10:57:37 am ---1) (1+tan^2 x)/ tan x = sec^2 x/ tan x

                              = 1/ cos^2 x * (cos x/ sin x)
                              = 1/ cos x sin x

Check the second part too... I think there should be a double angle somewhere.

--- End quote ---

You took L.H.S, I don't think so !  :-\

Alpha:
1/ tan x + tan x = 1+tan^2 x)/ tan x
                      = sec^2 x/ tan x

                      = 1/ cos^2 x * (cos x/ sin x)
                      = 1/ cos x sin x

-_-

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