NB: the '^' sign stands for 'raised to the power of'.

Q1)

Prove the identity.

sin^2x [sin square x] - cos^2x [cos square x] tanx - 1

/ [divided by] = /[divided by]

1 + 2sinxcosx tanx + 1

q2) the region is rotated through 360 degrees about x-axis. Calculate the volume of the shaded region.

the image : http://s941.photobucket.com/albums/ad25 ... 010025.jpg

that's the questions graph.

the image: http://s941.photobucket.com/albums/ad25 ... 010025.jpg

that's the question graph.