What is the best way to remember trigonometric ratios. No absurd Answers or else you would get reported. It's better to answer only the question you know.

Probably SOHCAHTOA

Step-by-step explanation:

SOH - S = SINE O = OPPOSITE H = HYPOTENUSE. So it would be sine = opposite / hypotenuse

CAH - C = COSINE A = ADJACENT H = HYPOTENUSE. soi it would be cosine = adjacent / hypotenuse

TOA - T = TANGENT O = OPPOSITE A = ADJACENT. So it would be tangent = opposite / adjacent

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19

r(0,90)(x,y) . t(-5,0)

last option

step-by-step explanation:

∆def to ∆d"e"f"

- rotate 90 counterclockwise degrees

- then translated 5 to the left (x --> x - 5)

answer is the last option