Friends please help me out with any of these three questions

Question

vishweshshrimali5 · Answer

Part 1 is the direction for part 2
rest are individual questions

anonymous · Answer

your questions are not claer at all.

vishweshshrimali5 · Answer

which ones please tell me

anonymous · Answer

3rd and 4th.

vishweshshrimali5 · Answer

third question says that let a,b,c and d be any 4 vectors such that each is inclined at some angle theta with the other vector.
Now u have to tell the value of
[a b c]

options are
(a)$$4/3\sqrt{3}$$
(b) $$3/\sqrt{3}$$
(c) 4/3
(d) $$2/3\sqrt{3}$$

amistre64 · Answer

there is a pretty basic recursive way to approach your #5

|dw:1336626390821:dw|

the smaller your "h" the closer your approximations are to the actual line.

n     x          y           h                   hy'
1     0         0       pi/180   slope applied to h
2  pi/180  y+hy'       ""                   ""

etc; when x = pi/2 you should be close