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3 years ago

If f(x) =tan(2x) then f'(pi/6)?

2 answers:

8 0

F ( x ) = tan ( 2 x );
f ` ( x ) = (1 / cos² x )· ( 2 x )` = 2 / cos² x
f` ( π/6 ) = 2 / cos² (π/6) = 2 / (√3/2)² = 2 : 3/4 = 8/3

Stolb23 [73]3 years ago

3 0

You should try an online calculator called tiger algebra...it really good and can answer question like these ones

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The sum of 15x^2 + 3x - 4 and 5x - 4 is..?

Nutka1998 [239]

Answer: 15x^2 + 8x - 8

Step-by-step explanation:

1) Add them together

(15x^2 + 3x - 4) + (5x - 4)

2) Combine like terms

15x^2 + 8x - 8

3 0

3 years ago

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Which of the following expressions are equivalent to 312?

lord [1]

Answer:

3(4+3^2)×8

Step-by-step explanation:

Evaluate the power

3(4+9)×8

Add the numbers 3×13×8

Calcuate the product and it will be 312

So the expression 3×(4+3^2)×8 are equivalent to 312

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3 years ago

Problem Page

garri49 [273]

Answer:

Bailey family's sprinkler was used for 35 hours and Harris family's sprinkler was used for 20 hours.

Step-by-step explanation:

Set up a system of equations.

Let be "b" the time Bailey family's sprinkler was used and "h" the time Harris family's sprinkler was used.

Then:

$\left \{ {{b+h=55} \atop {15b+40h= 1,325}} \right.$

You can use the Elimination method. Multiply the first equation by -15, then add both equations and solve for "h":

$\left \{ {{-15b-15h=-825} \atop {15b+40h= 1,325}} \right.\\.............................\\25h=500\\\\h=\frac{500}{25}\\\\h=20$

Substitute $h=20$ into an original equation and solve for "b":

$b+20=55\\\\b=55-20\\\\b=35$

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3 years ago

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sp2606 [1]

Answer:

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Step-by-step explanation:

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3 years ago

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bearhunter [10]

Answer:

Step-by-step explanation:

72 divided by 12 equals 6

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3 years ago

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