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2 years ago

Please help me thanks!

Mathematics

1 answer:

Sliva [168]2 years ago

7 0

Answer: See the screenshot below.

Explanation:

We'll be using these trig functions

sine = opposite/hypotenuse
cosine = adjacent/hypotenuse
tangent = opposite/adjacent

The inverse of those help us find the angle. Notation like arcsine is the same as inverse sine denoted as $\sin^{-1}$ on many calculators.

The decimal results are approximate.

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Why is C the answer for this question?

Grace [21]

Step-by-step explanation:

A left Riemann sum approximates a definite integral as:

$\int\limits^b_a {f(x)} \, dx \approx \sum\limits_{k=1}^{n}f(x_{k}) \Delta x \\where\ \Delta x = \frac{b-a}{n} \ and\ x_{k}=a+\Delta x \times (k-1)$

Given ∫₂⁸ cos(x²) dx:

a = 2, b = 8, and f(x) = cos(x²)

Therefore, Δx = 6/n and x = 2 + (6/n) (k − 1).

Plugging into the sum:

∑₁ⁿ cos((2 + (6/n) (k − 1))²) (6/n)

Therefore, the answer is C. Notice that answer D would be a right Riemann sum rather than a left (uses k instead of k−1).

8 0

4 years ago

Im so confused please help with 5 and 6

Drupady [299]

Answer:

5)102,78

6)56,56

See THE IMAGE FOR SOLUTION 

8 0

3 years ago

Read 2 more answers

Can not be bothered to write the question so ima just attach it

stellarik [79]

Use desmos graphing calculator, for visuals. It's easy to use as well.

A is 0 (zero)

(1x1 + 2x1 - 3)

B) D ( lies on 1 on our x-axis)

C) This tells you to draw a line at zero on the y-axis, a horizontal line BTW & read off the x values, where the line touches the pink graph/diagram.

y=x^2+2x-3 is the similar to x^2+2x-3=0 because the letter y now represents zero. So, that's why we draw the line y=0 (a horizontal line at zero). Then, use it to find the x values.

Thus, x = - 3 & x = 1

Hope this helps!

6 0

1 year ago

Triangle A B C is shown. Angle A C B is a right angle. An altitude is drawn from point C to a point on side A B to form a right

mars1129 [50]

Answer:

$BC=15\ units$

Step-by-step explanation:

see the attached figure to better understand the problem

In the right triangle ABC

Applying the Pythagorean Theorem

$AB^2=AC^2+BC^2$

substitute the given values

$17^2=8^2+BC^2$

solve for BC

$BC^2=17^2-8^2$

$BC^2=225$

$BC=15\ units$

5 0

3 years ago

Read 2 more answers

Answers:

ryzh [129]

Answers:

☆☆☆☆☆☆☆☆aTriangle ZYX
bTriangle YZX
cTriangle XZY
dTriangle XYZ

4 0

3 years ago