The average rate of change = ( y2 - y1 ) / ( x2 - x1 )
a.)
x1 = π / 4
x2 = 3 π / 4
y1 = cot ( π / 4 ) = 1
y2 = cot ( 3 π / 4 ) = - 1
( y2 - y1 ) / ( x2 - x1 ) =
( - 1 - 1 ) / ( 3 π / 4 - π / 4 ) =
- 2 / ( 2 π / 4 ) =
( - 2 / 1 ) / ( 2 π / 4 ) =
- 2 ∙ 4 / 1 ∙ 2 π =
- 4 / π
b.)
x1 = π / 6
x2 = π / 2
y1 = cot ( π / 6 ) = √3
y2 = cot ( π / 2 ) = 0
( y2 - y1 ) / ( x2 - x1 ) =
( 0 - √3 ) / ( π / 6 - π / 2 ) =
- √3 / ( π / 6 - 3 π / 6 ) =
- √3 / ( - 2 π / 6 ) =
( - √3 / 1 ) / ( - 2 π / 6 ) =
- √3 ∙ 6 / 1 ∙ ( - 2 π ) =
- 6 ∙ √3 / - 2 π =
- 2 ∙ 3 ∙ √3 / - 2 ∙ π =
3 √3 / π
h(t)=cot t
a.) [pi/4,3pi/4] b.) [pi/6,pi/2]
Find the average rate of change of the function over the give n interval and intervals. Please show step by step instructions.
Thanks
3 answers
Of course in this case you can write:
The average rate of change = ( h2 - h1 ) / ( t2 - t1 )
t1 = π / 4
t2 = 3 π / 4
h1 = cot ( π / 4 ) = 1
h2 = cot ( 3 π / 4 ) = - 1
( h2 - h1 ) / ( t2 - t1 ) =
( - 1 - 1 ) / ( 3 π / 4 - π / 4 ) =
- 2 / ( 2 π / 4 ) =
( - 2 / 1 ) / ( 2 π / 4 ) =
- 2 ∙ 4 / 1 ∙ 2 π =
- 2 ∙ 4 / 2 π =
- 4 / π
b.)
t1 = π / 6
t2 = π / 2
h1 = cot ( π / 6 ) = √3
h2 = cot ( π / 2 ) = 0
( h2 - h1 ) / ( t2 - t1 ) =
( 0 - √3 ) / ( π / 6 - π / 2 ) =
- √3 / ( π / 6 - 3 π / 6 ) =
- √3 / ( - 2 π / 6 ) =
( - √3 / 1 ) / ( - 2 π / 6 ) =
- √3 ∙ 6 / 1 ∙ ( - 2 π ) =
- 6 ∙ √3 / - 2 π =
- 2 ∙ 3 ∙ √3 / - 2 ∙ π =
3 √3 / π
The average rate of change = ( h2 - h1 ) / ( t2 - t1 )
t1 = π / 4
t2 = 3 π / 4
h1 = cot ( π / 4 ) = 1
h2 = cot ( 3 π / 4 ) = - 1
( h2 - h1 ) / ( t2 - t1 ) =
( - 1 - 1 ) / ( 3 π / 4 - π / 4 ) =
- 2 / ( 2 π / 4 ) =
( - 2 / 1 ) / ( 2 π / 4 ) =
- 2 ∙ 4 / 1 ∙ 2 π =
- 2 ∙ 4 / 2 π =
- 4 / π
b.)
t1 = π / 6
t2 = π / 2
h1 = cot ( π / 6 ) = √3
h2 = cot ( π / 2 ) = 0
( h2 - h1 ) / ( t2 - t1 ) =
( 0 - √3 ) / ( π / 6 - π / 2 ) =
- √3 / ( π / 6 - 3 π / 6 ) =
- √3 / ( - 2 π / 6 ) =
( - √3 / 1 ) / ( - 2 π / 6 ) =
- √3 ∙ 6 / 1 ∙ ( - 2 π ) =
- 6 ∙ √3 / - 2 π =
- 2 ∙ 3 ∙ √3 / - 2 ∙ π =
3 √3 / π
Bosnian, part b should be negative. Believe you solved as y2-y1/x1-x2 instead of y2-y1/x2-x1which would flip it to positive. Otherwise correct