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Galina-37 [17]
3 years ago
7

Calcular: E = (sec245o + tg45o) ctg37o - 2cos60o

Mathematics
1 answer:
Vlada [557]3 years ago
7 0

Answer:

-2.813

Step-by-step explanation:

Se simplifica inicialmente la fórmula en términos de las funciones trigonométricas fundamentales (Initially, the formula is simplified in terms of fundamental trigonometric functions):

(\sec 245^{\circ} + \tan 45^{\circ} )\cdot \cot 37^{\circ} - 2\cos 60^{\circ}

\left(\frac{1}{\cos 245^{\circ}}+\frac{\sin 45^{\circ}}{\cos 45^{\circ}}  \right)\cdot \left(\frac{\cos 37^{\circ}}{\sin 37^{\circ}} \right) - 2\cdot \cos 60^{\circ}

(-2.366 + 1 )\cdot (1.327) - 1

-2.813

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Naddik [55]

Answer:

<h3>              a. the  vertex represents a minimum point</h3><h3>              b.  f(x) = (x + 5)² - 5</h3>

Step-by-step explanation:

a.

a = 1 > 0  ← that means the parabola opens up, so the vertex is minimum of the function

b.

  f(x)=x^2+10x+20\\\\f(x)=\underline{x^2+10x+25} - 25+20\\\\f(x)=(x+5)^2-5

5 0
3 years ago
What’s the answer for this problem I’m very confused and stressed out with this problem
mariarad [96]

Would it help if you wrote it as

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Remember that a ( - )  times a ( - ) = a plus. The two minus signs become a plus.

 

7 0
3 years ago
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mezya [45]

Answer:

ok

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Which statements (more than one) describe the equation 3 x 9 = 27?
denis-greek [22]

Answer:

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Step-by-step explanation:

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2 years ago
What is 6.9 times 10^-2 in standard form? thanks :)
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Answer:

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Step-by-step explanation:

6.9 ×10^-2

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