natishtaylor1p8dirz
08.07.2019 •
Mathematics
What is the solution of sqrt(x+2) -15=-3
Solved
Show answers
More tips
- F Food and Cooking How to Sober Up Quickly? Important Facts and Tips...
- H Health and Medicine How to Properly Take a Blood Sugar Test?...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- L Leisure and Entertainment What to Bring on a Hike? Essential Items to Pack for a Safe and Enjoyable Adventure...
- L Leisure and Entertainment Couchsurfing: A New Way to Travel...
- S Style and Beauty Autotanning: Harmful or Safe?...
- F Food and Cooking 10 Ideas for a Wedding Anniversary Gift...
- H Health and Medicine How to Reduce Sweating in the Heat and Beyond: Say Goodbye to Excessive Sweat...
- F Food and Cooking Do Aphrodisiacs Really Work? Separating Fact from Fiction...
- H Health and Medicine What to Eat to Lose Weight?...
Answers on questions: Mathematics
- M Mathematics In triangle qrs, qr = 2x + 5, rs = 3x - 1, and sq = 5x. solve for x....
- M Mathematics What is the unit rate for 280 students/8 buses?...
- M Mathematics The posterior lobe of the pituitary gland is not a true endocrine gland because a it is unable to function as an endocrine tissue because it is actually part of the neural...
- M Mathematics The fish population of lake collins is decreasing at a rate of 3% per year. in 2004 there were about 1,300 fish. write an exponential decay function to model this situation....
- M Mathematics Problem: How many cubic yards of concrete must be ordered to pour the section below? 1 ft 18 ft 1.5 ft...
- M Medicine DOES ANYONE KNOW THE AWNSER PLEASE HELP...
Ответ:
x = 142
Step-by-step explanation:
We are given the following expression for which we are to find the solution:
Rearranging the equation to get:
Taking square root on both sides of the equation to get:
x = 142
Ответ:
You can use a little trigonometry to find the sides of the right triangle, or you can simplify the resulting expression first. Let's do the latter, as it results in an interesting formula.
The area of a triangle is given by ...
... A = (1/2)bh
For this triangle, we can consider the base to be BC = AB·cos(∠B). The height is then AC = AB·sin(∠B) and the area is half the product of these:
... A = (1/2)·AB·cos(∠B)·AB·sin(∠B)
The product sin·cos is part of a double-angle trig identity, so we can write
.. A = (1/2)·(AB)²·(1/2)·sin(2·∠B)
... A = (1/4)·(AB)²·sin(2·∠B) . . . . . . area from hypotenuse and angle
Filling in the given numbers gives
... A = (1/4)·(12 cm)²·sin(2·75°)
... Area ∆ABC = 18 cm²
Note that the above formula works using either acute angle in the right triangle. Using ∠B = 90°-∠A we can write it in terms of ∠A as
... A = (1/4)·(AB)²·sin(2·(90°-∠A)) = (1/4)·(AB)²·sin(180°-2·∠A)
Since sin(x) = sin(180°-x), this is the same as
... A = (1/4)·(AB)²·sin(2·∠A)
___
Thank you for an interesting problem.