Use the law of cosines to find the value of cos theta. round your answer to two decimal places. the opposite side of the theta is 5.7. adjacent to the theta is 9.8. hypotenuse is 10.2 a. 0.35 b. 0.23 c. 0.84 d. 1.23

C) 0.84

Step-by-step explanation:

Since According to the law of cosines ,

Where,

b is the opposite side of

And, a and b are the adjacent sides of .

Here, c= 5.7 , a = 9.8 and b= 10.2

Therefore,

⇒

⇒

⇒≈0.84

Thus, Option C is correct.

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

you just switch the numbers basically so it would be 3/17