At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
Hint cos 3x = cos(2x + x)
Ye s I know that.
I have a headache from a slip and fall accident and just don't feel like working. I will medal you if you have the correct answer.
but I dont think we can use that anyway because cos ( a + b) = cosa cosb - sina sinb
So can someone please tell me the answer
Its not C because that simplifies to -sin 2x + sin2x = 0
I know it's not D because I chose that and it was wrong
I cant convert cos 3x into any of the options . I think there might be an error in the question. I'll plug in x = 20 degrees and see if any of them work out to 0.5 (because cos 60 = 0.5)
try B then
- sin 60 + 2 cos 20 sin 20 = -0.2232 not that one
nor A - none of them equal cos 3x
thers a problem with the question
That's the beauty of Virtual School
I know it's not D or B, because I just got it wrong and can't do it over again. I have been told it's not A or C by an elite, and I KEEP GETTING THE QUESTION WRONG!!!!