Just need on this pre-calc math problem in webassign (homework), only need with a), then i'll learn how to do the rest

Step-by-step explanation:

Positive angles are measured counterclockwise from 0.  Negative angles are measured clockwise from 0.  So cos(-π/6) = √3/2.

Or, you can use angle reflection properties.

cos(-x) = cos x

cos(-π/6) = cos(π/6) = √3/2

Another way to look at it is to add 2π to the angle to turn it into a positive angle.

cos(-π/6) = cos(11π/6) = √3/2

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^