3 years ago

Use basic identities to simplify the expression. cos θ - cos θ sin2θ

2 answers:

7 0

Cos Ф - cos Ф.sin² Ф

sin² Ф = 1 - cos² Ф
cos Ф - cos Ф( 1-cos² Ф) = cos Ф - cos Ф - cos³ Ф = cos³ Ф

cos Ф - cos Ф.sin² Ф = cos³ Ф

Leviafan [203]3 years ago

5 0

Answer:

answer is cos ^3 0

Step-by-step explanation:

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Which value of K will make x^2-1/4x+k a perfect square trinomial?

lakkis [162]

To find it it is
ax^2+bx+c
if the first term (a) is 1 then c=b/2
b=-1/4
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k=-1/8

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4 years ago

What is the measure of the angle at the tail end of the kite?

Alja [10]

Answer:

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Step-by-step explanation:

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3 years ago

What is the mean absolute deviation?

Lostsunrise [7]

Answer:

0.8 cm

Step-by-step explanation:

The formula for MAD is attached in the picture.

x_i are the values (data)

x bar is the mean

n is the number of numbers (data)

For figuring out MAD, basically, <em>we subtract the mean from each of the values respectively and take the absolute value and SUM for all of the numbers in the data set. Then we divide by n, the number of numbers.</em>

<em />

Let's do this:

MAD = $\frac{|2-3|+|2-3|+|2-3|+|2-3|+|3-3|+|3-3|+|3-3|+|4-3|+|4-3|+|5-3|}{10}\\=\frac{1+1+1+1+0+0+0+1+1+2}{10}\\=\frac{8}{10}=0.8$

MAD is 0.8

6 0

3 years ago

If t(n) 2n+3 what is the 3rd term

german

The third term is 9

t(3)=2(3)+3
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3 years ago

Anyone know the answer?

kherson [118]

Answer:

A≈18.38

Step-by-step explanation:

Solve for area

Shape: Parallelogram

Formula: Base*Height

5.25*3.5=18.375

Round answer

Hope this helps.

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3 years ago