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.

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

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.