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3 years ago

Prove that , tan 4x = 4 tan x (1-tan^2 x ) / (1-6 tan^2x + tan^4x).

1 answer:

3 0

Based on your question to prove that both of the equations are true, you must first simplify them. So in accordance with my calculation and practicing step by step procedure i came with a solution and result in an answer of 1-(2tanx/1-tan^2x)^2

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Evaluate the expression when, m=-2 m²-6m-5 (Thank you for your help!)

Darina [25.2K]

Answer:

Step-by-step explanation:

$m=-2\\m^2-6m-5\\=(-2)^2-6(-2)-5\\=4-(-12)-5\\=4+12-5\\=16-5\\=11$

7 0

2 years ago

Which proportion could be used to find the length of side b?

Goshia [24]

Answer:

Step-by-step explanation:

Using the Sine Rule in ΔABC

$\frac{a}{sinA}$ = $\frac{b}{sinB}$ = $\frac{c}{sinC}$

∠C = 180° - (82 + 58)° = 180° - 140° = 40°

Completing values in the above formula gives

$\frac{a}{sin58}$ = $\frac{b}{sin82}$ = $\frac{8.4}{sin40}$

We require a pair of ratios which contain b and 3 known quantities, that is

$\frac{b}{sin82}$ = $\frac{8.4}{sin40}$

$\frac{sin40}{8.4}$ = $\frac{sin82}{b}$ → B

8 0

3 years ago

Read 2 more answers

1. What is the measure in radians for the central angle of a circle whose radius is 6 cm and intercept arc length is 5.4 cm?

fgiga [73]

Hello!

1.
find circumferece
c=2pir
c=2*6*pi=12pi
intercept is 5.4

2pi radians=all

part/whole=part/whole
5.4/12pi=x/2pi
times both sides by 12pi
5.4=6x
divide both sides by 6
0.9=x
answer is 0.9 radians

2.
assuming 9pi/5 radians

find circumference
c=2pir
c=2*26.9*pi
c=53.8pi

arc/circumference=(9pi/5)/2pi

x/(53.8pi)=(9pi/5)/(2pi)
x/(53.8pi)=18/5
times both sides by 53.8pi
x=608.46266 m
about x=608.46 m

Hope this Helps! Have A Wonderful Day! :)

5 0

3 years ago

I don't understand what the question is asking?

lana66690 [7]

OK for this question you need to find out how many more post are needed. If you look at the diagram it shows that one side is 50 feet. Now there are two sides that will need post, because the barn side need no more. Now if there are two side both 50 feet, and you need a post every ten feet. How many posts are needed?

5 0

3 years ago

Read 2 more answers

A store sells avocado for $2.80 per pound. What is the cost of a 2 1 pounds of avocado? 4

omeli [17]

$58.80 you need to multiply 2.80 x 21 to get your answer

7 0

2 years ago