4 years ago

{25 POINTS]

1 answer:

7 0

The point (3, -4) is on the terminal side of the Ø implies that the hypotenuse has a length of 5, by the pythagorean theorem.
Now recall cosØ = x / r where r is the hypotenuse.
So cosØ = 3 / 5.

You might be interested in

If cos x = −6/7, and 90° < x < 180°, what is cos⁡(2x)?

Naddik [55]

Recall the double angle identity:

$\cos2x=\cos^2x-\sin^2x=2\cos^2x-1$

Then

$\cos2x=2\left(-\dfrac67\right)^2-1=\dfrac{23}{49}$

6 0

3 years ago

The height, h, in meters above the ground, of a projectile at any time, t, in seconds, after the launch is defined by the functi

Ivanshal [37]

The equation $h(t) =-6t^2 + 15t + 2$ sets the parabola. You can find the parabola vertex as:

$t_v= \frac{-b}{2a} =- \frac{15}{2\cdot (-6)} = \frac{15}{12}= \frac{5}{4}=1.25$

then

$h( \frac{5}{4} )=-6\cdot (\frac{5}{4} )^2+15\cdot \frac{5}{4} +2= \frac{91}{8} =11.375$

This means that the maximum height is 11.375 m and a projectilereaches this height at 1.25 seconds.

The projectile initially launched at time t=0, so the initial height is h(0)=2 m

6 0

4 years ago

A temperature of 3225 °F will melt platinum. Gold melts at a temperature of 1947.974 °F.

Nookie1986 [14]

Answer:

1277.026

Step-by-step explanation:

What this question is asking is the difference between 3225 and 1947.974. To do this you subtract. 3225-1947.974. You get 1277.026 Deg F.

6 0

3 years ago

an apple orchard sells apples in bags of 10. the orchard sold a total of 2,430 apples one day. how many bags of apples was this

lozanna [386]