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3 years ago

Solve the equation 3cosx = 5sinx for x in the interval 0 smaller than equal to x smaller than equal to 360 degrees.

Mathematics

1 answer:

Artist 52 [7]3 years ago

5 0

The equation is false, because 3 $\neq$ 4.794579

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There are 5 students in class. each will be assigned a grade of a, b or

antiseptic1488 [7]

There could be five in each class.

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4 years ago

If x / 3 equals 6 then x equals

sleet_krkn [62]

Answer: X = 18

Step-by-step explanation:

Crossmultiply

8 0

4 years ago

Can someone please explain how to do these?

Pani-rosa [81]

Answer:

First question answer: The limit is 69

Second question answer: The limit is 5

Step-by-step explanation:

For the first limit, plug in $x=8$ in the expression $(9x-3)$ , that's the answer for linear equations and limits.

So we have:

$9x-3\\9(8)-3\\72-3\\69$

The answer is 69

For the second limit, if we do same thing as the first, we will get division by 0. Also indeterminate form, 0 divided by 0. Thus we would think that the limit does not exist. But if we do some algebra, we can easily simplify it and thus plug in the value $x=1$ into the simplified expression to get the correct answer. Shown below:

$\frac{x^2+8x-9}{x^2-1}\\\frac{(x+9)(x-1)}{(x-1)(x+1)}\\\frac{x+9}{x+1}$

Now putting 1 in $x$ gives us the limit:

$\frac{x+9}{x+1}\\\frac{1+9}{1+1}=\frac{10}{2}=5$

So the answer is 5

3 0

3 years ago

If ab= 7x-6 and bc= 12-2x. Then what does ac equal?

ra1l [238]

Ab = (7x-6) → b = (7x-6)/a (1)

bc = (12-2x) → b = (12-2x)/c (2)

Since (1) = (2) → (7x-6)/a = (12-2x)/c OR a/c = (7x-6)/(12-2x) (3)

Multiply both numerators of (3) by the SQUARE of their respective denominators;

(a*c²)/c = (7x-6)(12-2x)²/(12-2x)
Now simplify:

ac = (7x-6)(12x-2x) or ac = -14x² + 96x - 72

4 0

3 years ago

(8x + 11) - (7x - 5)?

zaharov [31]

Answer:

use the cymath calculator

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers