In triangle ABC, ZA = 45°, m2B = 40', and a = 7. Which equation should you solve to find b?
O A 20:45
cos40
b
7
O B. b2 = 72 - 2(7) bcos40°
sin40°
O c. sin45
6
D. sin45
sin40
b
7

step-by-step explanation:

hihi so drawing these 2 triangles is fairly simple. all that's left is finding the height of each one. luckily, we have a side length and an angle, so there is a trig function we can use to solve for the height. the easiest one to use would be tangent, since we have 2/3 things needed to find and the third needed is what we are solving for. tan(73°) * 30 ~= 98.13 and tan(73°) * 35 ~= 114.45

there should be an link icon on the bottom of the text box you get. it looks like a paperclip!

d .tv

step-by-step explanation:

the side tv is included in both triangles.   this means it corresponds to itself in the transformation.

this is justified by using the reflexive property, which states that anything is congruent to itself.