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

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elemis:
No the book is correct.

Here's how (next post)

elemis:








Actually the textbook is wrong :P

Arthur Bon Zavi:

--- Quote from: Ari Ben Canaan on November 07, 2010, 03:54:53 pm ---







Actually the textbook is wrong :P

--- End quote ---

Howzz That ? :P

SpongeBob:
1+sinx/ cosx should be.

Deadly_king:

--- Quote from: Ancestor on November 07, 2010, 03:25:04 pm ---Establish The Following :



What is this now ? Again some printing mistake ?

Question - 3 (c) Page Number - 152

--- End quote ---

This identity CAN be solved. The book is NOT wrong.

Ari's working is good until the third step, except for the minus sign which is a plus sign. ;)

Then you should replace cos2x by 1 - sin2x which is then substituted with (1 + sin x)(1 - sin x)

The you can eliminate (1 + sin x) from both the numerator and denominator to obtain the required solution. :D

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