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well its out of 270 each that is 540 in total, its no gud one....

an ideal scor-cut , hmm...well this can be told only after knwing the level of the paper.... cant be predicted without it !!!!

exactly, its all the same, nishant will u tell the answer to this question????

yeah...anubha's right...

next, hmmmm...next will be a gal again

yeah, its the same thing wat i hav done, moreover we hav one more approach

arey ........ get sin² x = 1-cos² x ....

ur welcome, if u hav any doubts in those chapters, do ask ,

here's one link for u, may be it can help u..... its given thr quite nicely

http://www.ndt-ed.org/EducationResources/CommunityCollege/EddyCurrents/Physics/inductance.htm

hey here is one solution

given that y=sin x

dy/dx = cos x

dx/dy = sec x

now let t= cos ⁷ x

then d (cos ⁷ x)/ dy = (dt/dx) (dy/dx)

= (-7 cos ⁶ x sin x) (sec x)

= -7 cos ⁵ x sin x

now let u = -7 cos ⁵ x sin x

thrfore d² (cos ⁷ x) / dy² = du/ dy

= (du/dx) (dx/dy)

= (-7cos ⁶ x + 35 cos⁴ x sin² x) (sec x)

= -7cos ⁵ x + 35 cos³ x sin² x

pls tell if m wrong anywhere!!!

yeah i forgot to exclude those two

sure, u can ask doubts here n we'll solve it

... n if u want to knw theory, u can try the study material of the forum..... its thr

yeah answer is 3

is the answer 1/3 ???

hey u can get to knw all this thru hc verma, its given thr quite nicely!!!

The information carrying signals are divided into two broad classes;

Analog
Digital

Analog signals are continuous electrical signals that vary in time as shown in figure 4a. Most of the time, the variations follow that of the non-electric (original) signal. Therefore, the two are analogous hence the name analog.

Figure 4a: Analog Signal

Not all analog signals vary as smoothly as the waveform shown in Figure 4a. Analog signals represent some physical quantity and they are a ?MODEL? of the real quantity.

Digital signals are non-continuous, they change in individual steps. They consist of pulses or digits with discrete levels or values. The value of each pulse is constant, but there is an abrupt change from one digit to the next. Digital signals have two amplitude levels called nodes. The value of which are specified as one of two possibilities such as 1 or 0, HIGH or LOW, TRUE or FALSE and so on. In reality, the values are anywhere within specific ranges and we define values within a given range.

thanx

wat exactly is meant by radius of curvature of a particle moving in a parabolic path??? n how to solve for it???