Question #79586
1 Answer
Dec 1, 2017
Explanation:
#"using the "color(blue)"difference formula for cos"#
#•color(white)(x)cos(A-B)=cosAcosB+sinAsinB#
#"we have this expansion above"#
#"with "A=94^@" and "B=18^@#
#rArrcos(94-18)^@=cos76^@#
