If sin y° = 9 divided by c and tan y° = 9 divided by d, what is the value of cos y°?

value of is

Step-by-step explanation:

Given :  

we have to find the value of  

Using trigonometric relation between  tangent , sine and cosine we have,

We are given

Substitute,  in relation above,  we have

solve for   , we have

Simplify , we get

Thus, value of is

choice b is correct

step-by-step explanation:

we have been given the following system of linear inequalities;

we are required to graphically determine the solution to these system of inequalities. using a graphing tool, the solution is as shown in the attachment below;