Expression 4: 0 greater than or equal to cosine left parenthesis, "R" minus .5sin left parenthesis, "A" minus "R" , right parenthesis , right parenthesis sine left parenthesis, "A" plus .5sin left parenthesis, "R" minus "A" , right parenthesis , right parenthesis Has graph.0≥cosR−.5sinA−RsinA+.5sinR−A
4
Expression 5: 0 greater than or equal to cosine left parenthesis, "A" minus "R" , right parenthesis minus .2 5 left parenthesis, 1 plus cos left parenthesis, "R" plus "A" , right parenthesis , right parenthesis0≥cosA−R−.251+cosR+A
5
Expression 6: 0 greater than or equal to cosine left parenthesis, "A" minus "R" , right parenthesis0≥cosA−R
6
Expression 7: 0 less than or equal to cosine left parenthesis, "A" minus "R" , right parenthesis minus .70≤cosA−R−.7