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Use the law of cosines to find the value of cos. (see pic attached inside!!) Round the answer to two decimal places!

A0.84

B0.35

C0.23

D1.23

Use the law of cosines to find the value of cos. (see pic attached inside!!) Round the answer to two decimal places! A. 0.84 B. 0.35 C. 0.23 D. 1.23 class=

Verified Answer :

Answer:

Option A) 0.84

Step-by-step explanation:

Given is a triangle with sides 10.2, 9.8 and 5.7

We are to find the angle opposite the side 5.7

We can use cosine law for triangles

\(5.7^2=10.2^2+9.8^2-2(10.2)(9.8) cos\theta\)

Simplify to get

\(32.49=104.04+96.04-199.92cos\theta\)

Simplify to get

\(cos \theta =08382\)

Round off to get 0.84

Hence option A is right answer

Answer:

The CORRECT anser is 0.22

Step-by-step explanation:

I took the test and I got stumped, so I checked here and the answer that was provided was WRONG!!!

View image gerrardtrev06142005

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