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3 years ago

Cos() = O A. V B. 173 2 OC. OD. -3

Mathematics

1 answer:

irga5000 [103]3 years ago

7 0

Answer:

-√3/2

Step-by-step explanation:

Given the expression:

Cos(7π/6)

Conver to degrees

= Cos(7(180)/6)

= cos 210

= -√3/2

Hence the value of cos(7π/6) is -√3/2

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zavuch27 [327]

Answer:

32 feet high

Step-by-step explanation:

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2 years ago

3^x+2=8^x-1 Solve for x.

zubka84 [21]

I assume the equation is supposed to be

$3^{x+2}=8^{x-1}$

Then we can write

$9\cdot3^x=\dfrac18\cdot8^x\implies\left(\dfrac38\right)^x=\dfrac1{72}$

Take the logarithm of base 3/8 on both sides:

$\log_{3/8}\left(\dfrac38\right)^x=\log_{3/8}\dfrac1{72}$

$\implies x\log_{3/8}\dfrac38=-\log_{3/8}72$

$\implies x=-\log_{3/8}72$

- - -

If the equation is actually $3^x+2=8^x-1$ , I'm afraid it cannot be solved exactly.

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3 years ago

Find the square of the following without actual multpliation . 43

devlian [24]

I'll explain how I found it without actual multiplication,

${40}^{2} = 1600 \\ {3}^{2} = 9 \\ 2 \times 40 \times 3 = 240 \\$

So,

${43}^{2} = 1600 + 240 + 9 \\ = 1849$

Hope this will help....

3 0

3 years ago

For what value of p the equation [p-3]x²+4[p-3]+4=0

Vikentia [17]

Step-by-step explanation:

(p-3)[x²+4]+4=0

(p-3)[x²+4]=-4

(p-3)=-4/x²+4

p=-4/x²+4+3

p=-4+3(x²+4)/x²+4

p= -4+3x²+12/x²+4

p=8+3x²/x²+4

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2 years ago

What is 23/8 as a decimal?

trasher [3.6K]

To write 23/8 as a decimal you have to divide numerator by the denominator of the fraction.
We divide now 23 by 8 what we write down as 23/8 and we get 2.875 

And finally we have: 
23/8 as a decimal equals 2.875

7 0

3 years ago

Read 2 more answers