Mathematics OpenStudy (maheshmeghwal9): OpenStudy (maheshmeghwal9): OpenStudy (maheshmeghwal9):

Answer is :-$-\sqrt{1-x^2}$ OpenStudy (experimentx):

cos inv 0 OpenStudy (experimentx):

is pi/2 OpenStudy (maheshmeghwal9):

ya I also did that OpenStudy (experimentx):

use circular inverse formula ... so it is called (i haven't tried this formula though) OpenStudy (maheshmeghwal9):

I haven't heard of circular inverse formula! OpenStudy (experimentx):

$\cos^{-1}A + \cos^{-1}B = AB + AB/(A^2+B^2)$ not sure though ... i made it up myself!! OpenStudy (maheshmeghwal9):

but I have a formula in my book:- $\cos^{-1} (A)+\cos^{-1} (B)=\cos^{-1} [AB-(\sqrt{1-A^2})(\sqrt{1-B^2})]$ OpenStudy (experimentx):

Oh ... that's the formula .. sorry!! OpenStudy (maheshmeghwal9):

np:) OpenStudy (maheshmeghwal9):

but u r like a teacher OpenStudy (experimentx):

no ... not a teacher ... just stupid old guy!! OpenStudy (maheshmeghwal9):

no! for me u r like a teacher:) OpenStudy (maheshmeghwal9):

so what should I do now about that formula? OpenStudy (maheshmeghwal9):

should I use that? OpenStudy (experimentx):

lol ... thanks for compliment :) ... though not deserved!! put the value of A=x and B=0 OpenStudy (maheshmeghwal9):

k! OpenStudy (maheshmeghwal9):

wait a minute plz:) OpenStudy (maheshmeghwal9):

I got |dw:1338122446950:dw|

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