verify the identity sin square theta + cos square theta =1
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sin theta= p/h
cos theta= b/h
squaring
p square/h square + b square/h square
p square+ b square=h square
h square/ h square = 1
HENCE PROVED
cos theta= b/h
squaring
p square/h square + b square/h square
p square+ b square=h square
h square/ h square = 1
HENCE PROVED
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