Answer:
<h2>a. $8.83</h2><h2>b. $136.83</h2><h2>The second option will be the right answer.</h2>Step-by-step explanation:
a.
The total tax which is need to be paid is 6.9% of the listed price.
6.9% of 128 = = 8.832 ≅ 8.83
b.
The person, who is going to buy a pair of boots, needs to pay the listed price as well as the required tax.
The total cost of the pair of boots is = listed price + tax = $(128 + 8.83) = $136.83
Answer:
Step-by-step explanation:
Notice that you don't need to evaluate the actual sin and cos functions, since you are in the presence of a well known Pythagorean identity that states that this type of addition of squares for the same angle should equal 1:
So, as long as the angle "x" is the same in both trig functions, this addition should render "1" (one).
Because in this case the angle involved is the same (in both cases pi/4), the identity is valid.
