Question

Engineers are analyzing the performance of windshield wiper blades. At the end of one swipe, the tip of a blade is at (−5, 7) when represented graphically. What is the sine value of this function? (2 points) negative 7 square root 74 divided by 74 negative 5 times square root of 74 over 74 7 times square root of 74 over 74 square root 74

Answer 1

The correct answer to this question is "7 times square root of 74 over 74."


First, we need to get for the "r."r^2 = (−5)^2 + 7^2r^2 = 25 + 49r^2 = 74r = square root of 74



Then, after that, we need to formulate the equation of a sin:sin x = 7 / rsin x = 7 / sqrt(74)sin x = 7 * sqrt (74) / 74

hope this helpsss

Answer 2

Option C.
`7.(√(74))/(74)`

Explanation:

At the end of one swipe the tip of one blade is at (-5, 7). We have to find sine value of this function.

As shown in the figure coordinates of the tip of the wiper blade are (-5, 7)

So
`sin a = (Height)/(Hypotenuse)`

Here Height of the triangle = 7

and Hypotenuse = x =
`\sqrt{(-5)^(2)+7^(2)}=√(25+49)=√(74)`

By putting these values in the expression

`sina=(7)/(x)=(7)/(√(74))=7.(√(74))/(74)`

Answer is option C.
`7.(√(74))/(74)`