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galina1969 [7]
3 years ago
15

What are the simplified forms of the expression

Mathematics
1 answer:
anastassius [24]3 years ago
4 0

Answer:

It's is A  and   D.

Step-by-step explanation:

Tan^2 theta cos 2theta

= (sin^2 theta / cos^2 theta )( 2 cos^2 theta - 1)

= 2 sin^2 theta  - sin^2 theta / cos^2 theta

= 2 sin^2 theta - tan^2 theta.

Tan^2 theta  cos 2theta

= ( 1 / cot^2 theta) * cos 2theta

= cos 2theta / cot^2 theta.

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Please help !! ............
Sauron [17]
I think the answer is C.... I’m not sure tho.
4 0
3 years ago
6. A semicircular disk of radius 3 ft. is revolved about its diameter (straight side) one complete revolution. Describe the soli
kaheart [24]

Answer:

) one complete revolution. Describe the solid determined by this revolution, and then find the volume of the solid.

Step-by-step explanation:

5 0
3 years ago
Can someone answer 15b
NISA [10]
A)

well, we know the elevator's rate is -20 f/s, ok, so every second, is dropping 20 feet, therefore, "y" is "distance from the ground floor", so when y = 0, meaning the distance to the ground floor is 0, so you ARE at the ground floor then.

and "x" is how many seconds you've been in the elevator.

now, she got in the elevator for 6 seconds, so, the elevator went down by 20 * 6, or 120 feet down, reason why the slope is negative, when she stopped, she was 350 feet away from the ground floor still though.

if the elevator went down 120 feet, and she's still 350 feet from the ground floor, that means  she boarded the elevator at 120 + 350 feet, or 470 feet.

b)

\bf \begin{array}{lcccllll}
&\stackrel{\textit{elapsed seconds}}{x_1}&\stackrel{\textit{ft from ground-floor}}{y_1}\\
%   (a,b)
&({{ 6}}\quad ,&{{ 350}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies -20
\\\\\\
% point-slope intercept
\stackrel{\textit{point-slope form}}{y-{{ y_1}}={{ m}}(x-{{ x_1}})}\implies y-350=-20(x-6)
\\\\\\
y-350=-20x+120\implies  y=-20x+\stackrel{y-intercept}{470}
6 0
3 years ago
I don't understand how to solve these problems
iragen [17]
When adding fractions you need to get common denominators then you multiply too times bottom and then boom add and there you go
8 0
3 years ago
Read 2 more answers
If 4 to the 3 power • 4 to the 3 power = m to the 6 power then m is
Sedbober [7]
4.
4^3 = 64
64X64 = 4096
4^6 = 4096
5 0
3 years ago
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