Respuesta :

Answer:

that is intresting i would say sin 2 θ + cos

2

θ

=

a

2

c

2

+

b

2

c

2

=

a

2

+

b

2

c

2

By Pythagoras

a

2

+

b

2

=

c

2

, so

a

2

+

b

2

c

2

=

1

So given Pythagoras, that proves the identity for

θ

∈

(

0

,

π

2

)

Step-by-step explanation:

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