formula for - sin2x - cos2x
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-1 is the ans
if sin ² + cos ² =one
tanspose both sin and cos so the equation is
0=1+sin2-cos²
trans pose one
-1=-sin²-cos²
if sin ² + cos ² =one
tanspose both sin and cos so the equation is
0=1+sin2-cos²
trans pose one
-1=-sin²-cos²
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