Use of parentheses is highly recommended to write:Consider the following simultaneous equations:
3 cos^2 ? + 2 cos^2 ? =4
3 sin 2 ? − 2sin 2 ?=0
Find the values of cos 2? and cos 2?.
Hence solve for ? and ?. Where 0°≤?≤360° and 0°≤?≤360°.
I have not worked on this problem, but3 cos^2 (?) + 2 cos^2 (?) = 4 .........................................................(1)
3 sin (2 ?) − 2 sin (2 ?) = 0 ..............................................................(2)
My first thought was to rewrite the first equation in terms of cos(2?) and cos(2?), using the power-reduction formula.Consider the following simultaneous equations:
3 cos^2 ? + 2 cos^2 ? =4
3 sin 2 ? − 2sin 2 ?=0
Find the values of cos 2? and cos 2?.
Hence solve for ? and ?. Where 0°≤?≤360° and 0°≤?≤360°.