2син+7син+4сос-3кос

To simplify the expression, we can combine like terms: 2sin + 7sin + 4cos - 3cos Since 2sin and 7sin are both sin terms, we can add them together: 2sin + 7sin = 9sin Similarly, since 4cos and -3cos are both cos terms, we can add them together: 4cos - 3cos = 1cos or simply cos So, the simplified form of the expression is: 9sin + cos