All categories

3 years ago

If tanθ = 4, what are possible values of cos(θ)?

Mathematics

1 answer:

swat323 years ago

8 0

Answer:

Step-by-step explanation:

You might be interested in

18. 2-(-8) + (-3) =<br> A. 1<br> B. 14<br> C. 12<br> D.7

ioda

Answer:

I think it’s 7 so D

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

72 is what percent of 480

VLD [36.1K]

72 is 15% of 480. if you divide 72 by 480 it gives you .15 and then you mutiply the .15 by 100

7 0

3 years ago

50. Insert three geometric means between 2 and 512.

saveliy_v [14]

The three geometric means between 3 and 512 are…

8, 32, 128

OR

-8, 32, -128

5 0

2 years ago

What is the equation that models the sequence 6,12,24,48

labwork [276]

The equation that models the sequence is: 6+6 each time.

8 0

3 years ago

Read 2 more answers

A parabola can be drawn given a focus of

Volgvan

Answer:

$y=-\frac{1}{4}(x-2)^{2}+9$

Step-by-step explanation:

Any point on a given parabola is equidistant from focus and directrix.

Given:

Focus of the parabola is at $(2,8)$ .

Directrix of the parabola is $y=10$ .

Let $(x,y)$ be any point on the parabola. Then, from the definition of a parabola,

Distance of $(x,y)$ from focus = Distance of $(x,y)$ from directrix.

Therefore,

$\sqrt{(x-2)^{2}+(y-8)^{2}}=|y-10|$

Squaring both sides, we get

$(x-2)^{2}+(y-8)^{2}=(y-10)^{2}\\(x-2)^{2}=(y-10)^{2}-(y-8)^{2}\\(x-2)^{2}=(y-10+y-8)(y-10-(y-8))...............[\because a^{2}-b^{2}=(a+b)(a-b)]\\(x-2)^{2}=(2y-18)(y-10-y+8)\\(x-2)^{2}=2(y-9)(-2)\\(x-2)^{2}=-4(y-9)\\y-9=-\frac{1}{4}(x-2)^{2}\\y=-\frac{1}{4}(x-2)^{2}+9$

Hence, the equation of the parabola is $y=-\frac{1}{4}(x-2)^{2}+9$ .

4 0

3 years ago