Using the following triangle, what is the sine of angle a?

sinA = a/c

Explanation: Since A is the angle, b is the adjacent side and c is the hypotenuse since it is across the 90 degree point. Side a is the opposite side, sine is opposite/hypotenuse.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

i belive those are the ones that are under 90 degreese.