Evaluate each of the following integrals.

1. ) tan' x dx 2.)S tan' 5x dx 3.) tan* 2xsec 2x dx 4.) ( tan' 5xsec* 5x dx 5.) [ tan* 4t sec 4t dt 6.) [ tan 6xsec* 6x dx 7.) sec* 10x tan 10xdx 8.) sec- 3x tan 3x dx 9. ) sec' 8x tan 8xdx 10.) [ sec' 1 1x tan 1 1x dx