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3 years ago

HELPPPPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Shalnov [3]3 years ago

7 0

I’m pretty sure it would be C= 81.64

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What is the surface area of the monument

Semmy [17]

Answer:

660

Step-by-step explanation:

ok this one is a little more tricky

20*5=100 do not double this one

20*12=240 do not double this one

20*13=260 do not double this one

remember the area of a triangle is A=1/2l*w

plug in the values

A=1/2(5)(12)

A=30 you have to double this one because there is two of them

now you must add up all your values

100+240+260+60=660

i hope i am not wrong... but hope it helps!

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3 years ago

Sin 2x + tan 2x = 4tan/ 1- tan^4 prove that

nalin [4]

$\dfrac{4\tan x}{1-\tan^4x}=\dfrac{4\tan x}{(1-\tan^2x)(1+\tan^2x)}$
$=\dfrac{4\tan x}{(1-(\sec^2x-1)\sec^2x}$
$=\dfrac{4\tan x\cos^2x}{2-\sec^2x}$
$=\dfrac{4\sin x\cos x}{2-\sec^2x}$
$=\dfrac{4\sin x\cos^3x}{2\cos^2x-1}$
$=\dfrac{2\sin2x\cos^2x}{\cos2x}$
$=2\tan2x\cos^2x$
$=2\tan2x\left(\dfrac{1+\cos2x}2\right)$
$=\tan2x(1+\cos2x)$
$=\tan2x+\sin2x$

7 0

3 years ago

Urgent I’ll give brainlist

Jobisdone [24]

Answer:

I think A

Step-by-step explanation:

Can you mark me brainliest because I am almost to level ace!

4 0

3 years ago

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Find value of P and Q

ch4aika [34]

Answer:

$P= 6 \frac{1}{7}\\\\Q = 4 \frac{2}{7}$

Step-by-step Explanation

$\frac{5 + 3 \sqrt{2} }{5 - 3 \sqrt{2} } = P+Q\sqrt 2 \\ \\ \frac{(5 + 3 \sqrt{2}) }{(5 - 3 \sqrt{2}) } \times \frac{(5 + 3 \sqrt{2}) }{(5 + 3 \sqrt{2} )} = P+Q\sqrt 2 \\ \\ \frac{ {(5 + 3 \sqrt{2} )}^{2} }{ {(5)}^{2} - (3 \sqrt{2})^{2} } = P+Q\sqrt 2 \\ \\ \frac{ {5}^{2} + {(3 \sqrt{2} )^{2} + 2.5.3 \sqrt{2} } }{25 - 9 \times 2} = P+Q\sqrt 2 \\ \\\frac{ 25 + 18 + 30 \sqrt{2} }{25 - 18} = P+Q\sqrt 2 \\ \\\frac{ 43 + 30 \sqrt{2} }{7} = P+Q\sqrt 2 \\ \\ \frac{43}{7} + \frac{30 }{7} \sqrt{2} = P+Q\sqrt 2 \\ \\ equating \: like \: terms \: on \: both \: sides \\ \\ P = \frac{43}{7} \\ \\ \huge \red { \boxed{ P= 6 \frac{1}{7}}} \\ \\ Q = \frac{30}{7} \\ \\ \huge \orange { \boxed{ Q = 4 \frac{2}{7} }}$

4 0

3 years ago

Please help with this one kinda lost in it Thank you

aleksklad [387]

The answer is c.
i hope this helped!

6 0

3 years ago

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