3 years ago

Find the cosine of F in the triangle below. Rationalize the denominator, if necessary.

Mathematics

1 answer:

r-ruslan [8.4K]3 years ago

5 0

Answer:

cos∠F = √15/15 ⇒ answer (D)

Step-by-step explanation:

∵ cos∠F = EF/FG

∵ EF = 2

∵ FG = 2√15

∴ cos∠F = 2/2√15 = 1/√15 ⇒ multiply yp and down with √15

∴ cos∠F = √15/15 ⇒ answer (D)

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