Matthew bought a jersey for $39.99, a pennant for $10.25, and a hat for $13.75. He paid with a $50 bill and the rest he borrowed
2 answers:
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A conservative vector field 
has curl 
. In this case,
so the vector field is not conservative.
so the vector field is not conservative.
Answer: We can arrange the steps with help of below explanation.
Step-by-step explanation:
Here ABC is a triangle,
Draw a perpendicular from BD to side AC ( construction)
where
In the right triangle BCD, from the definition of cosine:
cos C =CD/ BC
CD= a cos C
Subtracting this from the side b, we see that
DA= b-acos C
In the triangle BCD, from the definition of sine:
sin C =BD / a
BD = a sin C
In the triangle ADB, applying the Pythagorean Theorem
Substituting for BD and DA from (2) and (3)
⇒ ( On simplification)
⇒
⇒
⇒ (because,
)
