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sdas [7]
3 years ago
6

If sin⁡ θ=− 8/17 and 270°<θ<360°, what is cos⁡ θ?

Mathematics
1 answer:
I am Lyosha [343]3 years ago
6 0
Help pls help pls help pls help pls
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A line with a slope of 1/3 passes through the point (-8,9). What is its equation in point-slope form?
BARSIC [14]

Answer:

y - 9 = 1/3 (x+8)

Step-by-step explanation:

point slope form is y - y1 = m (x - x1)

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3 years ago
Tell whether the lines through the given points are parallel, perpendicular, or neither.
antoniya [11.8K]

Answer:

The Slope of Line 1 is ->  -\frac{2}{9}

The Slope of Line 2 is -> -\frac{9}{2}

These two lines are - >  Perpendicular

Step-by-step explanation:

To find the slope of line one, you follow these steps:

First Coordinate 10 -> x1, 5 -> y1

Second Coordinate -8 -> x2, 9 -> y2

Then insert the assigned values into this equation:  \frac{y2-y1}{x2-x1} -> \frac{9-5}{-8-10} which equals \frac{4}{-18} which simplifies to -\frac{2}{9}

Then do the same process to find the slop of line 2:

First Coord: 2 -> x1, -4 -> y1

Second Coord: 11 -> x2, -6 -> y2

Then insert the values into this equation: \frac{y2-y1}{x2-x1}  ->\frac{11-2}{-6-(-4)} which equals \frac{9}{-2}.

We know the lines are perpendicular by:

a. Typing the equations of the lines into a graphing calculator and observing the graph

b. Looking at the slopes. By looking at the slopes, we see that the slope of line 1 is the reciprocal of line 2, and vice versa. Since reciprocal slopes indicate perpendicular lines, the lines 1 and 2 are perpendicular to each other.

Hope this helps!

5 0
3 years ago
If cosu = 30/34 find sin2u
Tomtit [17]

Answer:

es tal vez otra vez se repite la pregunta

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2 years ago
What term describes a pair of vertical angles that are also supplementary: acute obtuse right straight?
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Your answer would be straight!!
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