Question

Question #79586

Answer 1

`cos76^@`

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^@`