1ha!!!!!!!!!!!!!!!!!!
if a=cosA+isinA,then 1+a/1-a =
1.cotA/2
2.cot A
3.icotA/2
4.itanA/2
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11 Answers
1Well.........
am getting..
isinA/(1+cosA)
Which I dont think evaluates to any of the given options.
1oooo!!!!!!!
i am getting isinA/1-cosA. how u get + there.neways my ans. is not in option.
1Yeah!!!!
I did the same thing but, I got the answer as in #3
Wat R U gettin Abhi [7][7]
1how it is not in the options kalyan
think again
sina=2sina/2cosa/2
1+cos2a=2cos2a/2
putting the values u get D
1no!you are wrong
BTW i got it so i am posting the solution.
(1+a)/(1-a)=isinA/(1-cosA)
={i2*sin(A/2)*cos(A/2)}/{2sin2(A/2)}
=icot(A/2)
so,ans. is C same as given in book
1i just proceeded the method of kalyan because he was blocked and i think u would be also trapped in it
i never solved it
just gave him yhe way
1Yeah dude, I was playing on the other side
So, I think I was paying less attention to this[3]