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3 years ago

I don’t get this sum 1 plz help quickkk

Mathematics

2 answers:

Inessa05 [86]3 years ago

8 0

Answer:

I would say A

Step-by-step explanation:

sattari [20]3 years ago

5 0

Answer:

that would be -9 since it's an isosceles triangle, which two base angles are the same, so that would add to 100. substitute -9 for x and add them to get 80. add all the angles and you get 180.

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Please help me out :P

Veseljchak [2.6K]

cos θ = $\frac{-4\sqrt{65} }{65}$ , sin θ = $\frac{-7\sqrt{65} }{65}$ , cot θ = 4/7, sec θ = $\frac{-\sqrt{65} }{4}$ , cosec θ = $\frac{-\sqrt{65} }{7}$

<h3>What are trigonometric ratios?</h3>

Trigonometric Ratios are values of all the trigonometric functions based on the value of the ratio of sides in a right-angled triangle.

Sin θ: Opposite Side to θ/Hypotenuse

Tan θ: Opposite Side/Adjacent Side & Sin θ/Cos

Cos θ: Adjacent Side to θ/Hypotenuse

Sec θ: Hypotenuse/Adjacent Side & 1/cos θ

Analysis:

tan θ = opposite/adjacent = 7/4

opposite = 7, adjacent = 4.

we now look for the hypotenuse of the right angled triangle

hypotenuse = $\sqrt{7^{2} + 4^{2} }$ = $\sqrt{49+16}$ = $\sqrt{65}$

sin θ = opposite/ hyp = $\frac{7}{\sqrt{65} }$

Rationalize, $\frac{7}{\sqrt{65} }$ x $\frac{\sqrt{65} }{\sqrt{65} }$ = $\frac{7\sqrt{65} }{65}$

But θ is in the third quadrant(180 - 270) and in the third quadrant only tan and cot are positive others are negative.

Therefore, sin θ = - $\frac{7\sqrt{65} }{65}$

cos θ = adj/hyp = $\frac{4}{\sqrt{65} }$

By rationalizing and knowing that cos θ is negative, cos θ = - $\frac{-4\sqrt{65} }{65}$

cot θ = 1/tan θ = 1/7/4 = 4/7

sec θ = 1/cos θ = 1/ $\frac{4}{\sqrt{65} }$ = - $\frac{-\sqrt{65} }{4}$

cosec θ = 1/sin θ = 1/ $\frac{\sqrt{65} }{7}$ = $\frac{-\sqrt{65} }{7}$

Learn more about trigonometric ratios: brainly.com/question/24349828

#SPJ1

5 0

2 years ago

Given: −3(a–b) < 0, which is the greater: a or b? Give numerical examples.

nordsb [41]

Answer:

Step-by-step explanation:

a = 3

b = 2

divide by -3, change the sign:

(a-b) > 0

a always has to be greater than be to be true

4 0

3 years ago

What is the distance between two points (1,6) and (8,4)

iogann1982 [59]

6,5 is two points to this equation

3 0

4 years ago

Read 2 more answers

1+1 show explanation

Snezhnost [94]

Answer:

1+1 = 2

1+1 = Window

1+1 = 11

Step-by-step explanation:

For solution One: get one apple. Then another apple. Finally u will have 2 apples

For the second solution: imagine the no. 1, just a straight line. 1+1 with the equal sign, one line on top/one line on bottom. Forms a window.

For the third solution: Simply add the digits together by removing the + between the numbers.

8 0

4 years ago

An electrician charges $40 per visit, and $20 per hour of work. On a particular day, he made 3 visits and calculated that his av

saw5 [17]

Answer:

4 hours

Step-by-step explanation:

For three visits, the electrician earned $40 × 3 = $120 in "per-visit" charges. For working x hours, he earned 20x in "per-hour" charges. The total of these came to 50x:

120 +20x = 50x

120 = 30x . . . . . . . . subtract 20x

4 = x . . . . . . . . . . . . . divide by 30

The electrician worked 4 hours that day.

3 0

3 years ago