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3 years ago

Which expression is not equal to 1?

Mathematics

2 answers:

ANTONII [103]3 years ago

7 0

Answer:

sin A cos A

Step-by-step explanation:

[ I don't know to type angle theta here so assume A as theta]

As , sin A= p/ h

cos A= b/ h

so,

sinA cosA = p/ h × b/h

= pb/ h^2 ( which is not equal to 1 )

Tip; you can easily verify other relations expressing trigonometric ratios in terms of p,b & h and further simplifying..

svetlana [45]3 years ago

6 0

Answer:

sin θcos θ

hope it is helpful to you

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A shirts costs $20, the cost of the shirt increases 30%, what is the price of the shirt now?

ki77a [65]

Answer: 10

Step-by-step explanation:

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3 years ago

A metallugarist has an alloy with 6% titanium and an alloy with 20% titanium. He needs 100 grams of an alloy with 13% titanium.

dsp73

$\bf \begin{array}{lccclllll}
&amount(g)&\textit{\% of titanium}&\textit{grams of titanium}\\
&-----&-----&-------\\
\textit{6\% alloy}&x&0.06&0.06\cdot x\\
\textit{20\% alloy}&y&0.2&0.2\cdot y\\
----&-----&-----&-----\\
mixture&100&0.13&100\cdot 0.13\to 13
\end{array}$

so.. .whatever those amounts are, of "x" and "y", for the mixture,
they must add up to 100 grams, or x + y = 100

and the titanium percentage of that sum, must yield a 13 grams of titanium on those 100 grams

thus $\bf \begin{cases}
x+y=100\to y=\boxed{100-x}
\\\\
0.06x+0.2\boxed{y}=13
\end{cases}$

do the substitution, and solve for "x",

what's "y" amount? well, y = 100 - x

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3 years ago

Follow ALL instructions for this assignment. In 3-5 sentences answer the question: What does the word similar mean and how does

vova2212 [387]

Answer:

the word similar means when to things are alike, it compares to congruent because congruent means thing are in harmony.

Things I would say are similar is a blanket and a sheet because they both provide coverage and warmth.

If I said things are similar it is because they are alike in meanings, or appearence.

I would use similar over congruent because congruent isn't a word you hear often. When you do hear it is mostly used to talk about angles and lines.

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3 years ago

How many solutions does this equation have: –5(4y + 1) = –5 − 20y.

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Answer:

Step-by-step explanation:

no solution I think no definite answer

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3 years ago

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If f(x) = x2 - 2x and g(x) = 6x + 4, for which value of x does (f+g)(x) = 0?

Law Incorporation [45]

Answer:

-2

Step-by-step explanation:

Let's plug your functions f(x)=x^2-2x and g(x)=6x+4 into (f+g)(x)=0 and then solve your equation for x.

So (f+g)(x) means f(x)+g(x).

So (f+g)(x)=x^2+4x+4

Now we are solving (f+g)(x)=0 which means we are solve x^2+4x+4=0.

x^2+4x+4 is actually a perfect square and is equal to (x+2)^2.

So our equation is equivalent to solving (x+2)^2=0.

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Subtracting 2 on both sides gives us x=-2.

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