Which equation can be used to find the measure of angle BAC ?
A
cosine inverse of open paren 13 over 12 close paren is equal to xB
tangent inverse of open paren 5 over 12 close paren is equal to xC
cosine inverse of open paren 12 over 13 close paren is equal to xD
tangent inverse of 12 fifths is equal to x