anaslion111 anaslion111
  • 18-08-2020
  • Mathematics
contestada

please help right now

please help right now class=

Respuesta :

wiitong0394703
wiitong0394703 wiitong0394703
  • 18-08-2020

Answer:

4sqrt(2) + 1

Step-by-step explanation:

Well you know that cos 0 is 1

this means that a+b = 9

cos 60 is 1/2

this means 1/2 a + b = 5

a = 8

b = 1

now plug in for x = 45

cos 45 = sqrt(2)/2

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