Do you mean
or something else?
cos(90º) = 0
Are you to find ALL solutions? Perhaps the Domain is restricted in some way?
Check your definitions. Are the coordinate axes technically IN the various quadrants?
solve all possible ans of x.
2) I got cosx=-1 and 0.4
i am suppose to find all possible ans of x.
i got 66.4 and 293.6 for the 0.4 already.
but how to slove for the -1? the reference angle is 0 and since cos is negative, it should be in the 2nd and 3rd quarant. and thus i got 90 and 180. however the ans is only 180. why?
this site and look just beneath the applet that graphs the cosine function (though this works just as well). There is a graph of y = cos(x) drawn in the "Did you notice" section.
12 cos x - 5 sin x = R cos (x + 22.6)
solve x in range 0 to 360 degrees
(12 cos x- 5 sin x)^2
Also, find the max and min value of eqn.
Kindly explain it clearly because I actually got an explanation from somewhere but it is not clear. Thank you greatly for your help.God bless you.