Grade 10 · Geometry
Sine, cosine, and tangent — a huge US search. Written in American English for students, parents, and teachers in the United States.
Open a card to see the answer. These are original practice items for US elementary students — not a state test copy.
Answer: opposite / hypotenuse
Sin = O/H.
Answer: adjacent / hypotenuse
Cos = A/H.
Answer: opposite / adjacent
Tan = O/A.
Answer: the longest side, opposite 90°
Never use a leg as the hypotenuse in SOHCAHTOA.
Answer: 3 (with hypotenuse 5)
Keep the ratio.
Answer: x, x√3, 2x
The side opposite 30° is the shortest.
Answer: equal, and hypotenuse leg√2
It is isosceles.
Answer: inverse trig (sin⁻¹, cos⁻¹, tan⁻¹)
Calculators have SIN⁻¹.
Pick the next article in this topic — that is how a magazine issue is meant to be used.
