Why are the values for sine and cosine equal at 45°? all three of the side lengths of the triangle are 1. the length of the side opposite the 45° angle equals 1. the length of the side opposite the 45° angle is twice the length of the side adjacent to the 45° angle. the length of the side opposite the 45° angle equals the length of the side adjacent to the 45° angle.

This is a nice place to point out that Trigonometry as practiced relies mostly on the two simplest right triangles, half an equilateral triangle giving a 30/60/90 right triangle, and half a square giving 45/45/90. Learn these cold and you've mastered half of Trigonometry. It should take about fifteen minutes.

Half a square means the two legs of the isosceles right triangle are the same length, last choice:

The length of the side opposite the 45° angle equals the length of the side adjacent to the 45° angle.

c. (0.6,-1.4)

step-by-step explanation:

hope this

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk