Please can you show me how to solve
sin2x-1=cos2x
i have tried various methods but am getting nowhere
this is my first post so thanks in advance for the help
Please can you show me how to solve
sin2x-1=cos2x
i have tried various methods but am getting nowhere
this is my first post so thanks in advance for the help
just use the double angle formulas for sine and cosine:
i have tried these but think i am missing something, i can get to the point
2sinxcosx-1=2cos^2x-1=0
2sinxcosx-1-2cos^2x+1=0
2sinxcosx-2cos^2x=0
but then am abit lost how to solve, can't find a way to factorise it, or have i done something wrong
i have tried these but think i am missing something, i can get to the point
2sinxcosx-1=2cos^2x-1=0
2sinxcosx-1-2cos^2x+1=0
2sinxcosx-2cos^2x=0
but then am abit lost how to solve, can't find a way to factorise it, or have i done something wrong