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Rus_ich [418]
3 years ago
9

my last question was deleted for asking whats 2+2 & may i just say , i have learned from my consequence , that when im bored

to never destract others from being serious SIIIIIKKEEEEEEEEEEEEEEEEEEEE LICKMA
Mathematics
2 answers:
castortr0y [4]3 years ago
7 0

Answer:

4

Step-by-step explanation:

adoni [48]3 years ago
5 0

Answer: The answer 2+2 is 4. HAHA funny question tho

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If sinA+cosecA=3 find the value of sin2A+cosec2A​
Irina18 [472]

Answer:

\sin 2A + \csc 2A = 2.122

Step-by-step explanation:

Let f(A) = \sin A + \csc A, we proceed to transform the expression into an equivalent form of sines and cosines by means of the following trigonometrical identity:

\csc A = \frac{1}{\sin A} (1)

\sin^{2}A +\cos^{2}A = 1 (2)

Now we perform the operations: f(A) = 3

\sin A + \csc A = 3

\sin A + \frac{1}{\sin A} = 3

\sin ^{2}A + 1 = 3\cdot \sin A

\sin^{2}A -3\cdot \sin A +1 = 0 (3)

By the quadratic formula, we find the following solutions:

\sin A_{1} \approx 2.618 and \sin A_{2} \approx 0.382

Since sine is a bounded function between -1 and 1, the only solution that is mathematically reasonable is:

\sin A \approx 0.382

By means of inverse trigonometrical function, we get the value associate of the function in sexagesimal degrees:

A \approx 22.457^{\circ}

Then, the values of the cosine associated with that angle is:

\cos A \approx 0.924

Now, we have that f(A) = \sin 2A +\csc2A, we proceed to transform the expression into an equivalent form with sines and cosines. The following trignometrical identities are used:

\sin 2A = 2\cdot \sin A\cdot \cos A (4)

\csc 2A = \frac{1}{\sin 2A} (5)

f(A) = \sin 2A + \csc 2A

f(A) = \sin 2A +  \frac{1}{\sin 2A}

f(A) = \frac{\sin^{2} 2A+1}{\sin 2A}

f(A) = \frac{4\cdot \sin^{2}A\cdot \cos^{2}A+1}{2\cdot \sin A \cdot \cos A}

If we know that \sin A \approx 0.382 and \cos A \approx 0.924, then the value of the function is:

f(A) = \frac{4\cdot (0.382)^{2}\cdot (0.924)^{2}+1}{2\cdot (0.382)\cdot (0.924)}

f(A) = 2.122

8 0
3 years ago
SIMPLE SEVENTH GRADE MATH PROBLEM. GOVING BRAINLIEST
adelina 88 [10]

Answer:

D is the answer

Step-by-step explanation:

Well 35 dollar one time fee

plus 15 per hour

If used 1 hour 15+35=50

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3 years ago
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You babysit for 3 hours. You receive $24. what is your hourly wage
storchak [24]

Answer

six dollars

Step-by-step explanation:

8 0
3 years ago
Help or else i’ll fail
Georgia [21]
The answer is equilateral
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3 years ago
Please help me, i will give brainliest to BEST answer
Travka [436]

three, twelve, five, and six

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