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stiv31 [10]
3 years ago
7

Cot²3x - 3cot3x +2 = 0 cotx = t what equation for t

Mathematics
1 answer:
kumpel [21]3 years ago
6 0

Answer:

Step-by-step explanation:

cot²(3x)=y

y²-3y+2=0

y²-y-2y+2=0

y(y-1)-2(y-1)=0

(y-1)(y-2)=0

y=1,y=2

cot3x=1

tan 3x=1=tan (π/4)=tan (nπ+π/4)

3x=nπ+π/4=(4nπ+π)/4=(4n+1)π/4

x=(4nπ+1)π/12,n is an integer.

cot 3x=2

tan 3x=1/2

3x=tan^{-1}(1/2)≈26.57°+360n

x≈8.86°+120n

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Answer:

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Step-by-step explanation:

5 0
2 years ago
If anyone knows how to do this
iogann1982 [59]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
(2 thousands 7 tens )÷10 in unit form and standard form is what?
Nutka1998 [239]
<span>1.       </span><span>Given equation = 2 thousands 7 tens / 10.
From this given equation, give the unit form and the standard form
Unit form is the expression where you replace the number with its place values.
=> 2 thousands and 7 tens divided by 1 tens.
=> 2 hundreds 7 ones – answer in unit form
Standard form is the expression which uses numbers and operators to express an equation.
=> 2 070 / 10
=> 207 – answer in standard form</span>



6 0
3 years ago
Read 2 more answers
In how many different ways can 10 be written as a sum of odd numbers
kakasveta [241]
5+5=10
3+1+1=10
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Hope this Helps!
7 0
3 years ago
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Alex Ar [27]

Answer:

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