tyre2k17
tyre2k17
28-08-2017
Mathematics
contestada
. Verify the Pythagorean Identity.
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Аноним
Аноним
28-08-2017
convert to sines and cosines:-
1 + cot^2 x
= 1 + cos^2 x / sin^2x
= sin^2 x + cos^2 x
---------------------
sin^2 x
but sin^2 x + cos^2 x = 1
so this = 1 / sin^2x which is the same as csc^2 x
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