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Whenever i am asked any question regarding min/max value of expressions involving triangles, i put equilateral triangle condition....works 99.99% of the times...

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 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

The point  (-11,8)

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 Discussion Forums -> This Post 5 points    (1    in 1 votes )   [?]

Total no of ways are 7!.

In each of these ways, there is a particular order for A,B,C.

Six such orders are possible-

ABC,ACB,BAC,BCA,CAB,CBA.

We want ABC order to appear which will be one-sixth of the total ways.

So the answer will be 7!/6 = 840.

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

It is

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Work done

= 2*R*(300) / (1/2)

= 1200 R

 Discussion Forums -> This Post 10 points    (2    in 2 votes )   [?]

1.

3C2*2!*3!=36

2.

5! - 3!.3! = 120 - 36 = 84

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Assume that the friction is acting in a particular direction..say forward.

Write the equations for

net force=mass*acceleration

and

net torque=moment of inertia * angular acceleration

Put condition for pure rolling.

If friction comes out to be negative, then the direction you have assumed in the first step is opposite to the direction of friction.

If friction comes out to be positive, then the direction you have assumed in the first step is the direction of friction.

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

On a serious note, make a time table for the month and stick to it. You can plan to finish alkanes in 3 hours and then take a self test...then alkenes or a part of it in next 3 hours.... make a timetable for the whole month to see how much you can finish.

Even if you don't finish everything just make sure whatever you have finished studying is perfectly there in your head.

Good luck!

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

(a) through a miracle

(b) by assuming that you're Rajnikanth

(c) Lindlar, Stephen, Claisen, Gattermann, Koch and all those great scientists come and teach you in your dreams

(d) All of these...

 Discussion Forums -> This Post 5 points    (1    in 1 votes )   [?]

The answer is BC...i think my reasoning is correct..

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Better see :

http://integrals.wolfram.com/index.jsp?expr=x+tan+x&random=false

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

See:

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Put x=tan t , dx=sec2t dt,

You'll get integral t2.sec2t dt

Take t2 as first function and integrate by parts

you'll get an integral 2t.tan t dt

It does not exist in terms of elementary functions.

It contains Polylogarithms.

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Hey I saw the solution to this question...but everyone is welcome to try it. It is a very good question..

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Plz revise your notes...cos x is even and so is its inverse.

 Discussion Forums -> This Post 5 points    (1    in 1 votes )   [?]

Since it has period pi/2, use g(x)=g(x+pi/2)

u'll get a=a2

a cannot be zero..a=1

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

It tells us that electrons can revolve arond the nucleus in some specified energy states where its angular momentum is an integral multiple of

.

 Discussion Forums -> This Post 5 points    (1    in 1 votes )   [?]

Time varying magneric field produces electric field, right? And electric force causes charges to move...and moving charges experience magnetic force.....I don't know if i'm right..

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