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Find the Inverse Function F-1 of the Function F f(x)=4cos(10x+7)f ( x ) = - 4 \cos ( 10 x + 7 )

Question 26

Multiple Choice

Find the inverse function f-1 of the function f.
- f(x) =4cos(10x+7) f ( x ) = - 4 \cos ( 10 x + 7 )


A) f1(x) =4cos1(10x+7) f ^ { - 1 } ( x ) = - 4 \cos ^ { - 1 } ( 10 x + 7 )
B) f1(x) =14[cos1(x10) 7]\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 4 } \left[ \cos ^ { - 1 } \left( \frac { \mathrm { x } } { 10 } \right) - 7 \right]
C) f1(x) =110[cos1(x4) 7]\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 10 } \left[ \cos ^ { - 1 } \left( \frac { \mathrm { x } } { 4 } \right) - 7 \right]
D) f1(x) =110[cos1(x4) +7]\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = - \frac { 1 } { 10 } \left[ \cos ^ { - 1 } \left( \frac { \mathrm { x } } { 4 } \right) + 7 \right]

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