Prove the identity: tan2x(cosx + cos3x) = sinx + sin3x

How do the graphs of y = 1/x and y=5/x+6 compare?

The sixth grade art students are making a mosaic using tiles in the shape of right triangles.each tile has leg measures of 3 centimeters and 5 centimeters.i f there are 200 tiles in the mosaic what is the area of the mosaic.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.