mathworld mathworld
  • 15-03-2018
  • Mathematics
contestada

given the diagram below, what is the answer?

given the diagram below what is the answer class=

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calculista
calculista calculista
  • 24-03-2018
we know that

if angle A=45°
then
angle C is also 45°
therefore
if  BC=6 
AB is also 6

applying the Pythagorean theorem
AC²=AB²+BC²--------> AC²=6²+6²------> AC²=72------> AC=6√2

cos 45=6/(6√2)--------> cos 45=1/√2

the answer is the option B
cos 45=1/√2

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matthewprichman
matthewprichman matthewprichman
  • 29-09-2020

Answer:

bc=6

Step-by-step explanation:

Answer Link

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