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koban [17]
3 years ago
5

Here is another one. I really hate geometry.

Mathematics
1 answer:
andriy [413]3 years ago
7 0
Its sideways and I cant read it
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option 1 drop down are: even-odd identity, quotient identity, Pythagorean identity, double-number identity.option 2 drop down ar
motikmotik

Answer:

The equation is given below as

\frac{\cos2x}{\cos x}=\cos x-\sin x\tan x

Step 1:

We will work on the left-hand side, we will have

\begin{gathered} \cos x-\sin x\tan x \\ \text{recall that,} \\ Quoitent\text{ identity is} \\ \tan x=\frac{\sin x}{\cos x} \end{gathered}

By substituting the identity above, we will have

\begin{gathered} \cos x-\sin x\tan x=\cos x-\frac{\sin x.\sin x}{\cos x}=\cos x-\frac{\sin^2x}{\cos x} \\  \end{gathered}

Here, we will make use of the quotient identity

Step 2:

By writings an expression, we will have

\begin{gathered} \cos x-\sin x\tan x=\cos x-\frac{\sin x.\sin x}{\cos x} \\ \cos x-\sin x\tan x=\frac{\cos^2x-\sin^2x}{\cos x} \end{gathered}

Here, we will use the definition of subtraction

\cos x-\frac{\sin^2x}{\cos x}

Step 3:

We will apply the double number identity given below

\begin{gathered} \cos 2\theta=\cos (\theta+\theta)=\cos ^2\theta-\sin ^2\theta \\ \cos 2x=cos(x+x)=\cos ^2x-\sin ^2x \end{gathered}

By applying this, we will have

\frac{\cos^2x-\sin^2x}{\cos x}=\frac{\cos2x}{\cos x}

Here, we will use the double number identity

\frac{\cos^2x-\sin^2x}{\cos x}

5 0
1 year ago
Classify the polynomial 5x3 + 4x - 2 by degree.
brilliants [131]

Answer:

3

Step-by-step explanation:

3 would be the degree of the polynomial since it has the highest degree.

3 0
3 years ago
Alina has just received 333 video games for her birthday to add to her existing 121212 video games. A week later she went to the
Katarina [22]
[(121212+333)(2)]+555
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3 years ago
1) A shirt went from $8 to $10.
bagirrra123 [75]

Answer:

1) 20% change I think its an increase.

If needed I could try to answer the 2nd question but I am sure that I got the first one right.

Step-by-step explanation:

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2 years ago
Someone please help my with my geometry test?!!!
jenyasd209 [6]

Answer:

what is the question

Step-by-step explanation:

6 0
2 years ago
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