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Mathematics: Post your doubts here!

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For Q10, I will require the answers from (i) and (ii) (a).

Here are the solutions for Q7 (complex numbers Argand Diagram):



Hope this helps. Peace.
if in the same question..they asked fr the mod of z where arg(z) takes its greatest value..then how do v solve it sir?
 
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Q.6)i) (consider cos(theta)=cosX)
L.H.S= 2cos^2(2X) -1 + 4[2cos^2 (X) -1]
=2[2cos^2(X) -1]^2 + 8cos^2(X) -5
on expanding and simplyfying furthr...u get R.H.S

Q.7)iii) sinX= 2/(x+2)
so 2/sinX=(x+2)
so 2cosecX=(x+2)
hence cosecX=(x+2)/2
which gives cosecX=(x/2)+1

Hope dis helps! :)

Thanks mate :)
Can you help me with the no. 8 (ii) too ? :(
 
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i
Thanks mate :)
Can you help me with the no. 8 (ii) too ? :(
solved it for u..but writing idk how to write dwn integration sign n all...and i tried uploaing a pic as wel..bt ders sum problem..idk wt..
sry..! :(
 
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if in the same question..they asked fr the mod of z where arg(z) takes its greatest value..then how do v solve it sir?

In that case we shall consider two right-angled triangles to make the necessary calculations:



Hope this helps. Peace.

Edit: My bad, I read your question wrongly as asking to find arg(z) min. Will show you the workings for |z| when arg(z) is a maximum shortly.
 
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Anybody can help me with ques 3. I don't know how to do the showing part...
 

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