Two mistakes
Sorry, I made another mistake. Though you're right, sin30° = \frac{1}{\sqrt{3}}, I made another mistake: -VRcosθ \widehat{j} ≠ -vtanθ \widehat{j}, but, = -vcotθ \widehat{j}.
So still, θ = 60°. Why is it so? (I know my answer's wrong, but I don't know why.)
Homework Statement
A person moving towards east with a speed 'v' observes the rain to be falling vertically downwards. When he doubles his speed, the rain appears to come at 30° angle with the vertical. Find the actual speed and direction of rain with vertical.
Homework Equations...
Thank you tiny-tim, for correcting the question. I've often noticed that if a question seems absurd or solving it gives odd results, then something in the question is probably wrong :wink:.
My query is solved. Thanks all!
To ehild: Yes, I'm sure. Only the answer is given, from where I've got the question. The answer given is 4,5,6 although I'm not sure how that fits into the question's conditions.
The main problem I'm facing is interpreting the question and representing it mathematically.
So you're saying that even + odd + even = odd. That's right, because even + odd = odd. But it's also possible for three consecutive positive integers to be odd + even + odd which is equal to even!
Is the above argument valid?
1. Three consecutive positive integers are such that the sum of the squares of the first two and the product of the other two is 46. Find the numbers. Variables: x. Three numbers: (x), (x + 1), (x + 2)
2. (I think, although I'm not sure.) x2 + (x + 1)2 + (x + 1)(x + 2) = 46
3.
x2...