Laplace Transform Poly Year 2

Find the laplace trans form for the following functions

1i*) 4cos^2 (2t)

oh..its u again.

Haha yup. nvm found the answer need to use this identity. Can show me how to derive this identity?

ummm....i burnt all my tutorials many years ago.

Hi,

First 2 results are double-angle identities, covered in Additional Maths.

As for the 3rd result, consider RHS:

1. numerator = 1 - cos(2u) = 1 - [ 1 - 2(sin u)^2 ]

2. denominator = 1 + cos(2u) =1 + [2(cos u)^2 - 1 ].

Thanks.

Cheers,
Wen Shih

hey wee,

slowly lookin like what i did in past....from formulas!!!!thats odd.......hmmmm..used to go on questions with answers on 1 whole page in past .

Hi Wireless,

You may read a short article I have written at:

Hope it'll help to clarify your understanding of the topic.

Thanks.

Cheers,
Wen Shih

wee,

damn...u selling past year tutorials???.....u accept paypal??:)

download all worked out model answers too??wished they had the internet in those days......