SOLUTION: Find the solution of the equation (i) cos2@ + sin@= 0 (ii) cos2@ + cos@=0 If 0≤@≤2π

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Question 1202938: Find the solution of the equation
(i) cos2@ + sin@= 0
(ii) cos2@ + cos@=0
If 0≤@≤2π
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
cos%282theta%29+%2B+sin%28theta%29=+0
1-2sin%5E2%28theta%29%2Bsin%5E%22%22%28theta%29+=+0
-2sin%5E2%28theta%29%2Bsin%5E%22%22%28theta%29%2B1+=+0
2sin%5E2%28theta%29-sin%5E%22%22%28theta%29-1+=+0
%282sin%28theta%29%2B1%29%28sin%28theta%29-1%29+=+0
2sin%28theta%29%2B1=0; sin%28theta%29-1=0
2sin%28theta%29=-1; sin%28theta%29=1
sin%28theta%29=-1%2F2; sin%28theta%29=1
theta=matrix%281%2C3%2C7pi%2F6%2C%22%2C%22%2C11pi%2F6%29; theta=pi%2F2

Edwin