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3 years ago

Cosx=4/5 what is sin2x cos2x and tan2x

Mathematics

1 answer:

earnstyle [38]3 years ago

4 0

Answer:

-24/5

Step-by-step explanation:

The solution to the problem is as follows:

cscx < 0 means 1/sinx < 0, or sinx < 0.

sinx = -3/5 because you're dealing with a 3-4-5 triangle, and we established

sinx is negative.

sin2x = 2sinxcosx = 2*-3/5*4/5 = -24/25

cos(2x) = cos^2(x) - sin^2(x) = 16/25 - 9/25 = 5/25 = 1/5

tan2x = sin2x / cos2x = -24/5

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exis [7]

Answer:

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3 years ago

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Solve for x : 2x−3 = 5

neonofarm [45]

Answer:

x=4

Step-by-step explanation:

2x-3=5

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4 years ago

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Please Help! The graph of y=f(x) is shown below. What are all of the real solutions of f(x)=0? (Picture of graph included)

qwelly [4]

Answer:

(7, 0), (-8, 0), (0, 0)

Step-by-step explanation:

y = f(x) = 0

the real solutions are the ones that cross the x-axis because when a point is on the x-axis, its y coordinate will be 0.

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3 years ago

-(6)^-1 a.6 b.1/6 c.-1/6 d.-6 No idea what I'm doing...

Monica [59]

$-(6)^{-1} = ?$
Representing in fraction for the best understanding
 $-(\frac{6}{1}) ^{-1} = ?$ 
When the exponent is negative, the inversion is made, the numerator becomes the denominator, and the denominator becomes the numerator, and the change of signal from the exponent, which was negative, becomes positive.

 $-( \frac{1}{6} )^1 =$
$\boxed{\boxed{- \frac{1}{6}}}\end{array}}\qquad\quad\checkmark$

Answer:
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3 years ago

Choose the graph that represents the equation y=3[x+1]+1.

MatroZZZ [7]

Answer:

Step-by-step explanation:

Discussion

You haven't given us any choices. Always do that it you have them. Look for the graph that looks like the one below. It has the following characteristics

It opens upward
It lowest point is -1,1
y never equals zero
The y intercept is 0,4

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2 years ago