In the given figure triangle abc is an isosceles
with ab= as, prove that the tangent pt
at a to the circum-circleof triangleabc is parallel
to bc.

this is a experment where you actully have to do the work like go take some photos in something your interstid in

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)