find x, if cos2x = cos60 cos30 ? sin60 sin30
Dear Student,
In the question,there is a question mark. Since it is not clear whether there is a plus or a minus sign in place of question mark, I have solved both ways:
In the first solution, there is plus sign in place of question mark and I the second solution,there is a minus sign in place of question mark.
Regards
In the question,there is a question mark. Since it is not clear whether there is a plus or a minus sign in place of question mark, I have solved both ways:
In the first solution, there is plus sign in place of question mark and I the second solution,there is a minus sign in place of question mark.
Regards