cos (sin^-1 1/4 - tan^-1 (-3) )

Note: I posted a picture below with my work and i wanted to see if i'm correct, if not, please help me out, thanks!!! <3 (Nod)

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- April 22nd 2013, 09:51 PMboltage619Give the exact value of the following (no calculators) :
cos (sin^-1 1/4 - tan^-1 (-3) )

Note: I posted a picture below with my work and i wanted to see if i'm correct, if not, please help me out, thanks!!! <3 (Nod) - April 22nd 2013, 10:32 PMspacemenonRe: Give the exact value of the following (no calculators) :
cosx =1/sqrt15

cosy=1/sqrt 10

sinx=1/4

siny=-3/sqrt10

nw apply cos(x-y) ,u get 1/sqrt150 - 3/4sqrt10 - April 22nd 2013, 10:42 PMboltage619Re: Give the exact value of the following (no calculators) :
Thanks, can you help me out with my other post? =P

- April 22nd 2013, 10:48 PMspacemenonRe: Give the exact value of the following (no calculators) :
which one will try

- April 22nd 2013, 11:01 PMboltage619Re: Give the exact value of the following (no calculators) :
- April 23rd 2013, 05:19 PMSorobanRe: Give the exact value of the following (no calculators) :
Hello, boltage619!

Quote:

Factor: .

We have two equations to solve . . .

. .