(17 - 2 ) + 15 ÷ 5

Mathematics

1 answer:

finlep [7]4 years ago

3 0

Answer:

1. 15.2

2. 114

3. 105

4. 5

5 21

6. 38

7. 6

8. 71

Step-by-step explanation:

i hope tis helps

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Help plz fast with this question

Ivahew [28]

90-7 =83 degrees

height = 3 miles

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3/cos(83) = 24.6165

rounded to nearest mile = 25 miles

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3 years ago

Find the exact value of cot 7pi/4 & sec13pi/6 including quadrant location

Gennadij [26K]

First we will convert those radian angles to degrees, since my mind works better with degrees. Let's work one at a time. First, $\frac{7 \pi }{4} * \frac{180}{ \pi }=315$ . If we start at the positive x-axis and measure out 315 we end up in the 4th quadrant with a reference angle of 45 with the positive x-axis. The side across from the reference angle is -1, the side adjacent to the angle is 1, and the hypotenuse is sqrt2. The cotangent of this angle, then is 1/-1 which is -1. As for the second one, converting radians to degrees gives us that $\frac{13 \pi }{6} * \frac{180}{ \pi } =390$ . Sweeping out that angle has us going around the origin more than once and ending up in the first quadrant with a reference angle of 30° with the positive x-axis. The side across from the angle is 1, the side adjacent to the angle is √3, and the hypotenuse is 2. Therefore, the secant of that angle is 2/√3.