Maths Homework

[pauliwauli2]

I'm stuuuuuuuuck! I know this is the advert section, but I know everyone looks here and I bet no one looks at science... No offense to you geeks out there! I'm only joking :D

if you have an equation such as: sinxcosx = 0 how do you work out what x is? i know it's easy and i've done it before, it's just gone out of my head! thank you

[HWKE]

any number when multiplied by 0 equals 0. Therefore we are looking for a value of x where either sinx=0 or cosx=0, which would be when x=0 degrees or x=90 degrees. cos90=0, sin0=0
If your question should have read sinx-cosx==0 the answer is 45 degrees cosx=sinx=0.707107 (1/sqrt(2))

[pauliwauli2]

thanks!