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UShape1 se the formulas for sine and cosine of sums of angles, 30-60-90 degree triangles and the 45-45-90 degree triangles to find the sine and
UShape1 se the formulas for sine and cosine of sums of angles, 30-60-90 degree triangles and the 45-45-90 degree triangles to find the sine and cosine of 75-15-90 degree triangles:sin(A+B)=sinA cosB +sinB cosAcos(A+B)=cosA cosB-sinA sinB
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