For the following exercises, find the work done. 53. Find the work done by force F ( x , y , ) = 2 y i + 3 x j + ( x + y ) k in moving an object along curve r ( t ) = cos( t ) i + sin( t ) j + 1 6 k . where 0 ≤ t ≤ 2 π
For the following exercises, find the work done. 53. Find the work done by force F ( x , y , ) = 2 y i + 3 x j + ( x + y ) k in moving an object along curve r ( t ) = cos( t ) i + sin( t ) j + 1 6 k . where 0 ≤ t ≤ 2 π
53. Find the work done by force
F
(
x
,
y
,
)
=
2
y
i
+
3
x
j
+
(
x
+
y
)
k
in moving an object along curve r(t) = cos(t)i + sin(t)j +
1
6
k. where
0
≤
t
≤
2
π
Students were asked to simplify the expression (secØ - cosØ)/secØ Two students' work is given.Student A: step 1 secØ/secØ - cosØ/secØstep 2 cosØ/1 - (1/cosØ)step 3 1 - cos^2Østep 4 sin^2ØStudent B: step 1 (1/cosØ)-cosØ)/secØstep 2 (1 - cos^2Ø/cosØ)/secØstep 3 sin^2Ø/cos^2Østep 4 tan^2ØPart A: Which student simplified the expression incorrectly? Explain the errors that were made or the formulas that were misused.Part B: Complete the student's solution correctly, beginning with the location of the error.
Although 330° is a special angle on the unit circle, Amar wanted to determine its coordinates using the sum and difference formulas.Part A: Determine cos 330° using the cosine sum identity. Be sure to include all necessary work.Part B: Determine sin 330° using the sine difference identity. Be sure to include all necessary work.
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