These ratios (from 2.4. above) are given special names opposite
hypotenuse = sine
adjacent
hypotenuse = cosine
орро
adja
re
All 3 of the above ratios are written as sin oor
Where is the angle of
For example sin30°, so sin 30 =
hypotenuse
3.1 Now use your calculator to evaluate the following valu
opposite
sin30°
cos30°
3.2. Compare your values in question 3.1 with the mean
question 2.4 and draw a conclusion from your observation.
conclusion below.​

your answer is a

step-by-step explanation:

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its 4 because 2 times 2 is 4, if you double the number two you get four

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.