Simplify (1 − cos x)(1 + cos x). A)1 B)cos^2x C)sin^2x D)tan^2x

What two criteria are needed for triangles to be similar

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?