Math, asked by beulafrancis143, 2 days ago

Let f : R → R, g : R → R defined by f(x) = 4x-1 and g(x) = cos x. The value of fog is ------ a. 4 cos x +1
b. 4 cos x
c. 4 cos x -1
d. 4 sin x +1​

Answers

Answered by anus42242
0

Answer:

Given that f(x)=cosx and g(x)=3x

2

Given f:R→R and g:R→R,

∴f o g:R→R and g o f:R→R

f o g(x)=f(g(x))=f(3x

2

)=cos(3x

2

)

g o f(x)=g(f(x))=g(cosx)=3cos

2

x

Since cos(3x

2

)

=3cos

2

x.

∴g o f

=f o g

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