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Can someone help me with this graph math problem please.

Can Someone Help Me With This Graph Math Problem Please class=

Sagot :

Answer:

x =  (√2)

Step-by-step explanation:

Note that this is a 45-45-90 triangle, and that

cos 45 = adjacent side / hypotenuse.  We want to find the value of x, which happens to be the adjacent side.

Recall (or look up) that cos 45 = 1/(√2).  Thus:

1 / (√2) = x / 2.  Solve for x by multiplying both sides by 2:

2 / (√2) = x

We want the answer as a fraction with ratinal denominator.  To obtain this, multiply both numerator and denominator by  (√2):

x =  (√2)