~ Nature's Huat ah! Blog ~

last SG · 2006-01-31T00:08:52+00:00

morning monk, morning mil0l0s i read that in some blog also, "zhng my car"

cos (cosec^2 x - 1) = (cot^2 x )

(sec^2 x - 1) = (tan^2 x)

so in the end they can cancel each other out loh Laughing

orh...... 1/ tan^2 x( tan^2 x) = 1. yeah~~

i do until sec^2 x -1 can change to tan^2 - 1. ylrc..

hooray, can go back eat ber Laughing

muz cheong trigo and log first.

neeh mind, dats wot mc r for Laughing

another one. 1 / 1+ sin x + 1/ 1-sin x = 2 sec^2 x

sianz...trigo belly mahuan Laughing

let ur brain go ki siao.

yah lah. tts why. log and trigo can fight

1 / (1+ sin x) + 1/ (1-sin x)
= (1 - sin x + 1 + sin x) / (1+sinx)(1-sinx)
= 2 / (cos^2 x)
= 2 sec^2 x

Laughing

log still ok, bian lai bian qu still the same

trigo too many identities to remember Laughing

jiak ber kir koon betta Laughing

how u get 2 sec^2 x

ok noe liaos.

nb. how to become smart at this stuffS????

1 / cos^2 x = sec^2 x mah Laughing

aiya, hate both. tts what i noe. didn noe maths can be so troublesome. daily life oso wont use de keep appearing.

dun wan. its betta to do work rather than koon.

sians. got ss hw, too bad cannot do cauz no notes.

just understand can liows, no nid to be smart Laughing

x2 Laughing

count $ & ¢ betta

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