Answer:

Step-by-step explanation:
<u>Step 1: Multiply</u>
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Answer: 
Answer:
15.4 m
Step-by-step explanation:
Answer:

Step-by-step explanation:
The sine of an angle is defined as the ratio between the opposite side and the hypotenuse of a given right-angled triangle;
sin x = ( opposite / hypotenuse)
The opposite side to the angle x is thus 1 unit while the hypotenuse is 3 units. We need to determine the adjacent side to the angle x. We use the Pythagoras theorem since we are dealing with right-angled triangle;
The adjacent side would be;

The cosine of an angle is given as;
cos x = (adjacent side / hypotenuse)
Therefore, the cos x would be;

Answer:
the third one
Step-by-step explanation:
area of a circle vs. it's diameter