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.

Question

Mathematics

Kitten

29 June, 08:41

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.

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Chicken Legs · Answer 1

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