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Find the Cos. please help.

Find the Cos. please help.-example-1
User Nspire
by
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1 Answer

4 votes

Answer:


cos(C)=\frac{√(1,353)}{{41}}

Explanation:

step 1

In the right triangle CDE find the length side of the hypotenuse, aoolying the Pythagoras Theorem


DC^(2)=4^(2)+(√(66))^(2)\\ \\DC^(2)=82\\ \\DC=√(82)\ units

step 2

Find the cos(C)


cos(C)=(√(66))/(√(82))=(√(33))/(√(41))=\frac{√(1,353)}{{41}}

User Matthew Setter
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