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Naily [24]
3 years ago
7

I want to prove that (2tanx)/(sec^2x)=sin2x.

Mathematics
1 answer:
4vir4ik [10]3 years ago
5 0

Answer:

Step-by-step explanation:

LHS = \frac{2 tan x}{Sec^{2} x}\\\\= 2tan x * \frac{1}{Sec^{2}x}\\\\= 2*\frac{Sinx }{Cos x}*Cos^{2}x\\\\= 2Sin x *Cos x\\= Sin 2x

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2=(1+r/100n)^nt
klasskru [66]

Answer:

a) Log ( 2 ) = 4t Log ( 83/80 )

b) 4.7 years

Step-by-step explanation:

Attached below is the detailed solution

<u>a) exponential statement in log form for an investment at 15% quarterly </u>

Log ( 2 ) = 4t Log ( 83/80 )

n = 4 ,  r = 15

<u>b) using change to base  to find double time in yr </u>

Double time in yr

t = Log ( 2 ) / 4log ( 83/80 )

= 4.7 years

5 0
3 years ago
Nick has a 50-foot ladder. He places the ladder 20 feet away from the base of a building. What is the distance between the base
Snezhnost [94]
The Pythagorean theorem is helpful here.
.. x^2 +20^2 = 50^2
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8 0
4 years ago
What is the Length of this line
baherus [9]

Answer:

I can't see that very good, but I counted 8 units.

Step-by-step explanation:

6 0
3 years ago
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PLEASE HLEP WITH QUESTION ONE PLS
nordsb [41]

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a .

Parallel lines → a & c

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b .

Parallel lines → d & e

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c .

I couldn't read it....

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d .

Parallel lines → ---

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e .

Parallel lines → b & c

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f .

Parallel lines → a & c

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8 0
3 years ago
What is the value of i 20+1?<br> 1<br> - т т .-
Elanso [62]
The answer to 20+1 is 21
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3 years ago
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