3 years ago

Cotx + tanx=2cosecx

Mathematics

1 answer:

Sophie [7]3 years ago

3 0

Answer:

sinx/cosx+cosx/sinx

sin^2+cos^2/cosx.sinx

1/(2sinx.cosx/2)

2/sin2x

2cosecx

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If the rule of the function is "multiply by 2 then add 3" and the input value is -2, what is the output value?

miv72 [106K]

The equation would be 2x+3 so when you plug it in it's 2(-2)+3 which simplify to -4+3 which is -1

5 0

3 years ago

The height H of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 9

mariarad [96]

Answer:

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

Step-by-step explanation:

Statement is incorrect. Correct form is presented below:

The height $h(t)$ of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 90 feet per second is given by equation $h(t) = 3 +90\cdot t -16\cdot t^{2}$ , where $t$ is time in seconds. After how many seconds will the ball be 84 feet above the ground.

We equalize the kinematic formula to 84 feet and solve the resulting second-order polynomial by Quadratic Formula to determine the instants associated with such height:

$3+90\cdot t -16\cdot t^{2} = 84$