joaallen21
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in triangle XYZ angle Y is a right angle and sinX=20/25. Find cosX in fraction and decimal form. Round to the nearest hundredth, if necessary.

Respuesta :

A^2+B^2=C^2
A-^2+ 20^2= 25^2
A^2+ 400= 625
Subtract 400 A^2= 225
A= 15 since sq rt of 225 is 15

cos = 15/25= 3/5=.6
Answer 3/5 and decimal .6

Answer 3/5 and decimal .6

Step-by-step explanation:A^2+B^2=C^2

A-^2+ 20^2= 25^2

A^2+ 400= 625

Subtract 400 A^2= 225

A= 15 since sq rt of 225 is 15

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