seaotter7140
18.03.2021 •
Mathematics
A guide into how to use law of sines or cosines would be greatly appreciated.
Solved
Show answers
More tips
- W Work and Career What is the Most In-Demand Profession in the Modern World?...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
- H Health and Medicine What is the Normal Blood Sugar Level in a Healthy Person?...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
Answers on questions: Mathematics
- M Mathematics A lot consists of eight good articles with four minor defects, and two major defects. One article is chosen at random, find the probability that (i) It has no defects (ii)...
- M Mathematics 1. Is this graph increasing or decreasing? Does this imply that the boa constrictor population is growing or diminishing? (1 point) 2 Looking at this graph, would you agree...
- M Mathematics Step 1: We know that Angle A B C Is-congruent-to Angle F G H because all right angles are congruent. Step 2: We know that Angle B A C Is-congruent-to Angle G F H because corresponding...
- M Mathematics Simplify this question: 4n+3(n-5)+2 What is the correct answer? A)n+6 B)7n-13 C)n-13 D)7n+6...
- H History I found an American Nickel from 1888. How much is it worth today? It s not in the greatest condition but you can still tell it s a nickel and you can still read the date. Just...
- M Mathematics What series of transformations can transform one heart into the other heart?...
- B Business The following information is available on a depreciable asset owned by mutual savings bank: purchase date july 1, year 1 purchase price $85,000 salvage value $10,000 useful...
- E English Where did Daniel get the light bulb from in the story pictures of Frankfurt...
Ответ:
RS = 22.5 feet, RT = 12.5 feet, and <R =
Step-by-step explanation:
Cosine rule can be applied only when given the three sides of a triangle, or two sides and an included angle. Otherwise, sine rule is applied.
i. <R + <T + <S = 180 (sum of angles in a triangle)
<R + 116 + 30 = 180
<R = 180 - 146
= 34
<R =
In the given question, since we have two angles and one side we apply the sine rule.
ii.
= 
RS =
= 22.5021
RS = 22.5 feet
iii. Also,
RT =
=
= 12.5179
RT = 12.5 feet
Thus,
RS = 22.5 feet, RT = 12.5 feet, and <R =
.
Ответ:
The formula used will be:
tan 42° = y/115
Step-by-step explanation:
Lets simplify the the question.
We have a boat which is situated at 115 meters away from a light house. It forms the base of the right angled triangle.
We need to find the distance from the bottom of the light house to the top of the light house. This distance is the height of the lighthouse, which forms the perpendicular side of the right angled triangle.
The distance between boat and top of the lighthouse is unknown, it forms the hypotenuse.
The angle of elevation, which is the angle between base and hypotenuse, is given as 42°.
The right angled formed is shown below.
We know that
tanθ = Perpendicular / Base
tan42 = height / 115
If height= y
tan 42° = y/115
Solve for y.
y = 103.55 meters