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Marrrta [24]
3 years ago
11

If you understand this please help thanks

Mathematics
1 answer:
Rus_ich [418]3 years ago
4 0

Answer:

50tt

Step-by-step explanation:

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True or false (Picture provided)
Naya [18.7K]
<h2>Hello!</h2>

The answer is: True.

<h2>Why?</h2>

A counterexample is a way that we can prove that something is not true about a mathematical equation or expression, it's also considered as an exception to a rule.

So:

sec^{2}x-1=\frac{cosx}{cscx}\\\\tg^{2}x=\frac{cosx}{\frac{1}{sinx}}\\\\\frac{1-cos2x}{1+cos2x}=cosxsinx

Then, evaluating we have:

\frac{1-cos(2*45)}{1+cos(2*45)}=cos(45)*sin(45)\\\\\frac{1-0}{1+0}=\frac{\sqrt{2} }{2}*\frac{\sqrt{2}}{2}\\\\1=\frac{(\sqrt{2})^{2} }{4}\\\\1=\frac{2}{4}\\\\1=\frac{1}{2}

Hence, we can see that the equation is not fulfilled, so, 45° is a counterexample for sec^{2}x-1=\frac{cosx}{cscx} and the answer is true.

Have a nice day!

3 0
4 years ago
How do you show your work on this question -x/3+2=-5
Ilya [14]

Hello!

\large\boxed{x = 21}

\frac{-x}{3} + 2 = -5

Begin isolating for x by subtracting 2 from both sides:

\frac{-x}{3} + 2 - 2 = -5 - 2\\\\\frac{-x}{3} = -7

Further simplify by multiplying both sides by 3:

\frac{-x}{3} * 3= -7 * 3\\\\-x= -21

Multiply both sides by -1 to cancel out the -x:

-x(-1) = -21(-1)\\\\x = 21

4 0
3 years ago
What is the value of x
Sloan [31]

Answer:53

Step-by-step explanation:

6 0
4 years ago
Event E is defined as the occurrence of one or more of two mutually exclusive events, E1 and E2-. How can you find the probabili
katen-ka-za [31]
If events E1 and E2 are mutually exclusive, it means that it is impossible for them to happen together. The probability of the occurrence of one or more of these events is the sum of their individual probabilities. The answer for this item would be,
                               P(E) = P(E1) + P(E2) + ...
7 0
3 years ago
The cone has a radius of 6m and a height of 9cm what's the volume ?
Arlecino [84]

Answer:

339.4cm³

Step-by-step explanation:

V

=

π

r

2

h

3

22/7×6²×9/3= 339.42

7 0
3 years ago
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