For sin2x+cosx=0, use a double-angle or half-angle formula to simplify the equation and then find all solutions of the equation in the interval [0,2π).

Step-by-step explanation:

Given is a trignometric equation in x, as

TO make it in one trig ratio, we can replace sin2x as 2sinx cosx

WE get now

Principal solution is

x = ±π/2 + 2kπ, where k is any integer or

x=±pi/6 +k pi, where k is any integer.

General solution is

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.

depends what are you allowed to do ?