Find \cos\left(\dfrac{19\pi}{12}\right)c os( 12 19π )cosine, left parenthesis, start fraction, 19, pi, divided by, 12, end fraction, right parenthesis exactly using an angle addition or subtraction formula.

The value of given expression is .

Step-by-step explanation:

The given expression is

The trigonometric ratios are not defined for .

can be split into .

Using the addition formula

We know that, and

lies in third quadrant, by using reference angle properties,

Therefore the value of given expression is .

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

step-by-step explanation:

well if you round, things become much more simple. round 5.95 to 6, 4.25 to 4, and 1.05 to 1. now, add 6+4+1 and that would equal 11. so the items together would equal to about $11.