Given that A is an angle and the answer to sec A=2.4 is sec(-1)(2.4), could it be converted to Cosine by secant A=1/cos A, multiply by 1 ie cos A/1 divided by cos A/1therefore secant (-1) = cos A??

Question

amistre64 · Answer

sec and cos are reciprocals of each other

amistre64 · Answer

$$\frac{cos}{1}=\frac{1}{sec}$$
$$\frac{sec}{1}=\frac{1}{cos}$$

amistre64 · Answer

$$sec(A) = 2.4 \ \implies \ sec^{-1}(2.4) = A$$
i cant say for sure, but I dont think the '-1' means flip it; basically becasue sec is the name of a function.  

f(x) = 3x+4 but does 

f^(-1)(x) = 1/(3x+4)  ??

amistre64 · Answer

to invert is to undo.

the inverse of a function coupled with the function produce an identity

amistre64 · Answer

$$(f\ o\ f^{-1})(x)=x$$
if im remembering this right