Find the exact value of sin ( 2 a. if cos a = 3 /5 . assume a is a quadrant i angle in standard position.

(hurry! ) which expression is equivalent to the following complex fraction?

Multiplying an even number of negative numbers gives an answer that is choose from:

Aplot of land has been surveyed for a new housing development with borders ab, bc, dc, and da. the plot of land is a right trapezoid with a height of 60 feet and an opposite leg length of 65 feet