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Set Up an Integral for the Length of the Curve y=7cotx,π4xπ2y = 7 \cot x , \frac { \pi } { 4 } \leq x \leq \frac { \pi } { 2 }

Question 255

Multiple Choice

Set up an integral for the length of the curve.
- y=7cotx,π4xπ2y = 7 \cot x , \frac { \pi } { 4 } \leq x \leq \frac { \pi } { 2 }


A) π/4π/21+49csc4xdx\int _ { \pi / 4 } ^ { \pi / 2 } \sqrt { 1 + 49 \csc ^ { 4 } x } d x
B) π/4π/21+7csc2xdx\int _ { \pi / 4 } ^ { \pi / 2 } \sqrt { 1 + 7 \csc ^ { 2 } x } d x
C) π/4π/2149csc2xdx\int _ { \pi / 4 } ^ { \pi / 2 } \sqrt { 1 - 49 \csc ^ { 2 } x } d x
D) π/4π/21+49csc2xdx\int _ { \pi / 4 } ^ { \pi / 2 } \sqrt { 1 + 49 \csc ^ { 2 } x } d x

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