# Search results

1. ### Verifying Trig Identities help!

OHH!!!!! see i told you it would probably be very easy.... thanks for your help!
2. ### Verifying Trig Identities help!

ok thanks for your help Integral! and hypermorphism, sorry i just can't see how to get rid of the fractions... i'm sure its very easy and i will feel really dumb though....
3. ### Verifying Trig Identities help!

well this is what i tried to do.... first i tried to combine them (cos x - cos y) ( sin x - sin y)/ (sin x + sin y) (cos x + cos y) then i got (cos^2 x ) - (cos^2 y)/(sin x + sin y) (cos x + cos y) + (sin^2 x)(sin^2 y)/ (sin x + sin y) (cos x + cos y) and after that part i...
4. ### Verifying Trig Identities help!

cos x - cos y sin x - sin y sin x + sin y + cos x + cos y = 0 or to see better i guess.... (cos x - cos y)/(sin x + sin y) + (sin x - siny)/(cos x + cos y) = 0 can you guys help me? i'm really stuck on this!
5. ### Physics: conservation of energy and springs

i do not really understand.... i was told i would most probably use conservation of energy and the 2d motion equations.. is that the same as what you explained?
6. ### Physics: conservation of energy and springs

Two children are playing a game in which they try to hit a small box on the floor with a marble fired from a spring-loaded gun that is mounted on a table. The target box is 2.20m horizontally from the edge of the table. Bobby compresses the spring 1.10cm, but the center of the marble falls...
7. ### Physic problem springs

Physic problem.... springs A 700g block is released from rest at height Ho(initial) above a vertical spring with spring constant k=400 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.0 cm. How much work is done A) by the block...