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alex41 [277]
3 years ago
9

ASAP please it’s very important

Mathematics
1 answer:
zaharov [31]3 years ago
4 0

Answer:

x = 30° and 330°

Step-by-step explanation:

Assuming the intervals is {0 , 2π} or {0° , 360°}

tan\ x=\frac{-\sqrt{3} }{3} \\\\x=tan^{-1} (\frac{-\sqrt{3} }{3})\\\\x = -30

So it means it lies in the 2nd and 4th quadrant because tangent is negative in the 2nd and 4th quadrant

so the two solutions are

x = 30° and 330° or

x=\frac{\pi }{6}\ radians\ \ , \ \ \frac{11\pi }{6}\ radians

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Please solve fast. Q.No. 26 and 29.<br>26. x²+5x+25/4<br>27. x²/4y²-2/3+4y²/9x²​
Usimov [2.4K]

Step-by-step explanation:

26. x²+5x+25/4 = (x + 5/2)²

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6 0
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Read 2 more answers
The 17th term of an Arithmetic sequence is 51. If the commons difference is 7, what is the first term ?
vovikov84 [41]

Answer:

The first term is:

  • a_1=-61

Step-by-step explanation:

The arithmetic sequence is defined by

a_n=a_1+\left(n-1\right)d

where

a_1 is the first term

d is the common difference

as

the 17th term of an arithmetic sequence is 51.

i.e. a_{17}=51

so

a_n=a_1+\left(n-1\right)d

a_{17}=a_1+\left(17-1\right)d        

51=a_1+\left(17-1\right)7         ∵ n = 17, a_{17}=51 , d=7

a_1+112=51                   ∵ \left(17-1\right)\cdot \:\:7=112

a_1=-61

Therefore, the first term is:

  • a_1=-61
8 0
3 years ago
√2+1<br> b) Rationalize the denominator:<br> √2+1
Misha Larkins [42]

Answer:

there is not a complete question here ...

\sqrt{2} +1 is not in a denominator to rationalize

if it were you would multiply the rational expression (the fraction)

by \frac{\sqrt{2} -1}{\sqrt{2} -1} the result (in the denominator would end up being "2 -1"

which is 1

Step-by-step explanation:

4 0
3 years ago
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