wilsonj7905 wilsonj7905
  • 02-02-2021
  • Mathematics
contestada

Can someone help me understand this

Can someone help me understand this class=

Respuesta :

GeorgePP
GeorgePP GeorgePP
  • 02-02-2021

Answer:

Step-by-step explanation:

If we define the line QR to be some variable of distance 'x', we can use the relationship of cosine to figure out the length of QR.

Remember, cosine is adjacent of the angle divided by the hypotenuse of the angle. So, if we take this x value over the longest side (hypotenuse), we get the value of cos(theta).

cos(25) = x/7

Multiply both sides by 7 to get:

7*cos(25) = x

Let your calculator do the work to get:

x = 6.3

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