Math, asked by joelróx, 1 year ago

if 29 cos∅=20,find sec²∅-tan²∅

Answers

Answered by Prasanthc

cos =adjacent /hypotenuse
so adja=20. hypo=29..
by Pythagoras theorem H^2=O^2+A^2
841=O^2+400
O^2=441
O=21
sec=29/20
tan=21/20
then substitute...841/400. -441/400
400/400=1

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