I'm having trouble with these two questions. I already have the answers from Wolfram Alpha, I need to know every step that gets me to the answer. 1) Sin3X - Sin7X = √(3)sin2X 2) (SinX - CosX)² + TanX = 2sin²X Solve for X. These questions might look innocent, but they're not.
In the first one your taking the square root of the (3)sinx right? And are those already solved, or is that the whole equation?
The √(3) is the coefficient of Sin2X, they're not all under the radical, which is why I put brackets around the 3. so √(3) times Sin2X
I did trigonometric equations, but it's been something like seven years and I've forgotten the identities through disuse now...
Way too late in the evening for me to do this, but it isn't a case of identities. More of function study since we want the points on the graph, not an equality true for every x. find x / f(x) = g(x) <=> f(x)-g(x) = 0 Study the function, it's derivative, it's second derivative and when it is null => the points we want.
