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
cosine inverse of open paren 12 over 13 close paren is equal to xC
tangent inverse of 12 fifths is equal to xD
tangent inverse of open paren 5 over 12 close paren is equal to x