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Vinil7 [7]
3 years ago
10

I need 18 please ???

Mathematics
1 answer:
dolphi86 [110]3 years ago
4 0

Omg at school recently we learned the exact same thing.

(x-8)+4x=7x-16

5x-8=7x-16

-5x    -5x

-----------------

-8=2x-16

+16    +16

-----------------

8=2x

4=x

7(4)-16

The answer is 12*

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What is the exact value of tangent (negative StartFraction pi Over 3 EndFraction)
ExtremeBDS [4]

Answer:

tan(-π/3) =  -1.732050808

Step-by-step explanation:

Given in the question, we have to find the value of tan(-pi/3) or it can be written as:

x = tan(-\frac{\pi}{3})

where x is the exact value of the given tangent.

However, in this question, one may get confused and put the value of π = 3.14, which is wrong. The value given is in radians, which is used to measure angles, just like degrees.

To make it easier, lets convert the radians into degrees. We know that

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4 0
3 years ago
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That does not make any since...

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insens350 [35]

Answer:

x=9

Step-by-step explanation:

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8 0
3 years ago
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masha68 [24]

Answer:

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Step-by-step explanation:

hope this is helpful

6 0
3 years ago
Prove that \displaystyle \frac{\cos \theta}{1 + \sin \theta} = \frac{1 - \sin \theta}{\cos \theta}
Bogdan [553]

Answer:

sin^2(θ)+cos^2(θ)=1

Step-by-step explanation:

We know that the statement above is true because of the Pythagorean identity theorem, which states the aforementioned equation. If you solve the equation for 1 you get the same equation.

To do this first multiply both sides by cos(θ), this gives you (cos^2θ)/1+sinθ = 1-sinθ

Then, multiply both sides by sinθ. This equals cos^θ=1-sin^2θ.

Finally, add sin^2θ to both sides. This equals the final answer of cos^2θ+sin^2θ=1. Which is true.

7 0
3 years ago
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