SOLUTION: if sin a + sin theta =9 and cos a + cos theta=6 , then the value of cos^2 1/2(a-theta)

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Question 1112818: if sin a + sin theta =9 and cos a + cos theta=6 , then the value of cos^2 1/2(a-theta)
Answer by greenestamps(13215) About Me  (Show Source):
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The given conditions are not possible. The maximum value of sine or cosine is 1; the maximum value of the sum of 2 sines or of 2 cosines is 2.