• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Mathematics: Post your doubts here!

Messages
1,414
Reaction score
18,489
Points
523
suppose i have 135 degree angle and i want to convert to radian
i know how to do that by math but i want a faster way
also how to use calculator for differentiation and ingegration qs
yeah..just do the same thing i told before..click on shift..mode(the one with the power button) and 4 for radians..
for differentiation and intergration i'll give u a video..its easy u will get it
 
Messages
187
Reaction score
976
Points
103
ok thanks but how to do part v

For g-1 (3), we first need g-1 (x) first. To find that, we first make x the subject instead of y.

g(x) = 4 -3 sinx

y = 4 - 3 sin x

x = (4-y) / 3

but this is g^-1 y not g-1 (x), replace y with x in the formula we made and we'd get g-1 (x)

g-1 (x) = (4-x)/3

g-1 (3) = sin-1 (4 - 3)/4 = sin-1 1/4 = 2.80
 
Messages
187
Reaction score
976
Points
103
Can someone help me do this questionView attachment 60318
You are given mean, sd. and that books greater than 29 are large. You can first use normal approximation to find the probability of the books that are larger than 29 cm.
The answer you get is actually the success, p of getting a book which is large. q=1-p with p, q and n as 8, you can simply use binomial distribution for
P(X=0) + P(X=1)
 
Messages
456
Reaction score
280
Points
73
i am not good in trigonometry which rules should i know for this qs
i know that cos90-x=sinx
sin90-x=cosx
tan90-x=1/tanx

is this enough
which trigonometry formulas should i know for those qs

A few more :
sin 180-x = sin x
cos 180-x = -cosx
sin 90+x = cosx
cos 90+x = -sinx
sin 180+x = -sinx
cos 180+x = -cosx

For tan use the identity tan x =sin x/cos x.
 
Top