1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dedylja [7]
2 years ago
9

Help, I don’t know what I’m doing Trigonometry

Mathematics
2 answers:
Gnom [1K]2 years ago
8 0

The answer is \boxed {\frac{1}{2\sqrt{3}}}

The needed trigonometric values :

  • The value of cot 60° = 1/√3
  • The value of cos 60° = 1/2

Hence, the value of the expression is :

  • cot 60° × cos 60°
  • 1/√3 × 1/2
  • 1/2√3
spin [16.1K]2 years ago
5 0

Answer:

\frac{\sqrt{3} }{6}

Step-by-step explanation:

using the 30- 60- 90 triangle for exact values , then

tan60° = \sqrt{3} , and

cot60° = \frac{1}{tan60} = \frac{1}{\sqrt{3} }

cos60° = \frac{1}{2}

cot60° cos60°

= \frac{1}{\sqrt{3} } × \frac{1}{2}

= \frac{1}{2\sqrt{3} } ← rationalise the denominator by multiplying by \frac{\sqrt{3} }{\sqrt{3} }

= \frac{1}{2\sqrt{3} } × \frac{\sqrt{3} }{\sqrt{3} }

= \frac{\sqrt{3} }{6}

You might be interested in
Write 5 consecutive integers of which x is the middle one
stich3 [128]
X-2, x-1, x, x+1, x+2
3 0
3 years ago
Square root 2 • square of root 200
pantera1 [17]
The correct answer is 20. 
square root 2 times square root of 200 = square root of 400 ans since 400 is a perfect square, then I'll calculate to 20. 
8 0
3 years ago
3. Nina has $20.14 in her purse. She buys lunch<br> for $9.67. How much does she have left?
o-na [289]

Answer:

Nina has $10.47 left.

Step-by-step explanation:

$20.14 minus $9.67 is $10.47

6 0
3 years ago
Read 2 more answers
The expression below represents the number of bacteria in a petri dish after t hours. Interpret the meaning of the expression.
konstantin123 [22]

The answer is B) The initial number of bacteria is 57, and the growth rate is 31% per hour.


The expression shown is an <em>exponential expression</em>.  An exponential expression usually takes the form ab^{x}, as this one does.  A represents the <em>initial value</em>, in this case-the initial number of bacteria.  B represents the <em>growth rate</em>.  When it is an increasing growth rate, it will begin with 1, because it will have everything it had before, plus the percent increase, the decimal portion.  In this case, a=57, and b=0.31.


Hope this makes sense!

3 0
3 years ago
Which inequality statement describes the two numbers on a number line? "−5 and a number 4 units to the right of −5" A) 4 &lt; −5
Marina CMI [18]

Answer: D

Step-by-step explanation:be cause you have to add 4 to negetive 5 and and that negetive 1 which is greater than -5

8 0
3 years ago
Other questions:
  • Historically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the pre
    7·1 answer
  • A group of hikers is descending a mountain at a rate of 400 feet per hour. What is the change in the elevation of hikers after 6
    7·1 answer
  • Is this a reduction or enlargement?
    9·1 answer
  • Triangle XYZ, with vertices X(-2, 0), Y(-2, -1), and Z(-5, -2), undergoes a transformation to form triangle X′Y′Z′, with vertice
    7·2 answers
  • Name the salt formed when magnesium reacts with hydrochloric acid
    14·1 answer
  • jill sold half her comic books then bought 16 more she now has 36 how many did she start with? help me plz ...?
    12·2 answers
  • The high school debate team is developing a logo to represent their club. A scale drawing of the logo design is presented below,
    8·2 answers
  • Express 0.2826 as a fraction.
    13·1 answer
  • Evaluate each expression for the given value(s) of the variables(s).
    11·2 answers
  • ( i will give brainlist ) What is the equation of the following graph?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!