3 years ago

Find the values of x for which the equation cos x = 1 is true

Mathematics

1 answer:

BlackZzzverrR [31]3 years ago

3 0

Just find the inverse cosine of 1 which is 0 degrees.

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O prove that all circles are similar, you would use similarity

Katen [24]

All circles have the same angles, just different degrees

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4 years ago

A person standing at the edge of a cliff throws a rock upward from a height of 180ft above ground level with an initial velocity

taurus [48]

Answer: 8.73 ft/s

Step-by-step explanation:

We have the following equation that models the motion of the rock:

$h(t)=-16t^{2}+64t+180$

Where $h(t)$ is the height of the rock at a time $t$ .

Now, if $h(t)=48 ft$ we can find $t$ and then the velocity of the rock at that height:

$48=-16t^{2}+64t+180$

Rearranging the equation:

$-16t^{2}+64t+132=0$

Multiplying the equation by -1:

$16t^{2}-64t-132=0$

Solving with the quadratic formula $t=\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}$ , where $a=16$ , $b=-64$ , $c=-132$ .

$t=\frac{-(-64)\pm\sqrt{(-64)^{2}-4(16)(-132)}}{2(16)}$

Choosing the positive result of the equation:

$t=5.5 s$

Since velocity $V$ is defined as the traveled distance $h(t)$ in a given time $t$ , we have:

$V=\frac{h(t)}{t}$

$V=\frac{48 ft}{5.5 s}$

$V=8.727 ft/s \approx 8.73 ft/s$ This is the velocity of the rock at the height of 48 feet

7 0

3 years ago

13) You are setting the combination on a

Andre45 [30]

Answer:

there are 9 possibilities I think

3 0

3 years ago

Complete the statement using < >, or =. |-18| __ 19 A: < B: > C: =

eduard

Answer:

Step-by-step explanation:

the inverse of -18 is +18. +18 is less than 19

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3 years ago

What is the simplet form of 7 — 12?

inysia [295]

Answer:

-5

Step-by-step explanation:

7−12

=7−12

=7+−12

=−5

6 0

3 years ago