Question

Please help
http://prntscr.com/1229cf

Answer 1

@hartnn

Answer 2

i dont understand u have the answer below

Answer 3

is its solution correct

Answer 4

@hartnn

Answer 5

i think its correct.
checking the sum again, just to be sure.

Answer 6

http://prntscr.com/1229lg

Answer 7

yes, thatssum=-6 was correct.

Answer 8

http://prntscr.com/1229lg
can you explain this one

Answer 9

yeah....number of cycles means how many times the same part of graph repeats.
like

Answer 10

2

Answer 11

for a its 2 cycles

Answer 12

na...its just one cycle..

Answer 13

because the curve increases and then decreases, it does not increase again for 2nd cycle

Answer 14

ok for part b

Answer 15

y = Asin ( w* theta )
has the period of T = 2pi /w
here,
y= 2 sin (theta)
so, w=... ?

Answer 16

could you find w ?

Answer 17

?

Answer 18

what is multiplied with theta ?

Answer 19

inside "sin"

Answer 20

its 2

Answer 21

y=2 sin θ = 2 sin pi/2 = 2 X 1 = 2

Answer 22

'2' is outside sin

Answer 23

its like 2 sin (1*theta)

Answer 24

so, w= 1
period = 2pi/ w = 2pi/1 = 2 pi

Answer 25

so 2 pi for part b

Answer 26

yes.

Answer 27

in y=A sin (w theta), A is the amplitude
so, in y= 2 sin theta,
amplitude = 2

Answer 28

period and amplitude you can verify from graph also.
once cycle ends at 2p, so period = 2pi
max. positive value of graph = 2, then amplitude = 2

Answer 29

thanks a lot

Answer 30

welcome :)