Respuesta :

Answer:

cos theta1=3/8

draw a triangle

l\

l \. 8

z l \

l__✓\

3

(sry for the inaporopriate fig)

tick mark represents theta here

cos is adjacent/hypotenuese

sin is opposite /hypotenuese

let unknown side be z

=64-9

=55

z=55

sintheta =55/8

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