The solution of the differential equation cos x cos y dx +
sin x sin y dy = 0 is
Answer Posted / sangeetha
cosx/sinx)dx+(siny/cosy)dy=0
This is nothing but the derivative of
log(sinx)-log(cosy)+logc
log(sinx/cosy)=logc
sinx/cosy=c
sinx=c cosy
| Is This Answer Correct ? | 13 Yes | 2 No |
Post New Answer View All Answers
In a square, all the mid points are joined. The inner square is shaded.If the area of the square is A, what is the area of the shaded area?
A number, when it is divided by 8 it gives a remainder 3 and is divisible by both 3 and 5. Find the number.
complete the series: a c b d f e g i __
If a car starts from A towards B with some velocity due to some problem in the engine after travelling 30km.If the car goes with 4/5 th of its actuval velocity the car reaches B 45min later to the actual time. If the car engine fails ofter travelling 45km, the car reaches the destination B 36min late to the actual time , what is the initial velocity of car and what is the distance between A and B in km ans) 20 &
there were three suspects for a robbery that happend in a bank, tommy, joy and bruceEach of them were saying that I haven't done anything and the other two has done it.police found that tommy was lying .who is the thief.
If 15 pens costs Rs.90..then what will be the cost of 22pens?
Fathers age is 5 times his son's age. 4 years back the father was 9 times older than son.Find the fathers' age.
If p/q = 5/4 , then 2p+q= ?
the difference b/w the compound interest payble half yearly and the simple interest on a certain sum cont out at 10% p.a for 1 year is Rs 25 what is the sum
What is the error in the given sequence. 2,3 6,7 14,15 29,46.
A boy picks up the phone and asks" who are you?" The voice from the other side answers" I am your mother's mother in law".What is the relation of the boy with the fellow speaking at the other end.
Y catches 5 times more fishes than X. If total number of fishes caught by X and Y is 48, then number of fishes caught by X?
What is the difference between control module
There are 4 married couples out of which 3 a group is needed . But thier should not be his of her spouse .How many groups are possible ?
Conversation between two mathematicians: first : I have three children. The product of their ages is 36 .. If you sum their ages . it is exactly same as my neighbour's door number on my left. The second mathematician verifies the door number and says that the not sufficient . Then the first says " o.k one more clue is that my youngest is the youngest" Immediately the second mathematician answers . Can you answer the question asked by the first mathematician? What are the children ages?