SAT Math Level 2 - TRIGONOMETRY

Question 1

Sin0 =

Answer 1

O / H (opposite over hypotenuse)

Question 2

Cos0 =

Answer 2

A / H (adjacent over hypotenuse)

Question 3

Tan0 =

Answer 3

O / A (opposite over adjacent)

Question 4

csc0 =

Answer 4

1 / sin0 = H / O (hypotenuse over opposite)

Question 5

sec0 =

Answer 5

1 / cos0 = H / A (hypotenuse over adjacent)

Question 6

cot0 =

Answer 6

1 / tan0 = A / O (adjacent over opposite)

Question 7

Two special Triangles

Answer 7

45 - 45 - 90

30 - 60 - 90

Question 8

45 - 45 - 90 Triangle

Answer 8

Hypotenuse = square root 2x

Other 2 sides = x

Question 9

30 - 60 - 90 Triangle

Answer 9

Hypotenuse = 2x
Opposite 30 degrees = x
Opposite 60 degrees = square root 3

Question 10

Area of equilateral triangles

Answer 10

square root 3 / 4 x length squared

Question 11

Heron’s Formula

Answer 11

If you have the 3 lengths of the triangle but no angles

work out the semiperimeter
s = (a + b + c) / 2

Area = square root (s (s - a)(s - b)(s - c) )

Question 12

180 degrees =

Answer 12

Pi Radians

Question 13

1 + tan squared 0 =

Answer 13

sec squared 0

Question 14

1 + cot squared 0 =

Answer 14

csc squared 0

Question 15

sin0 = (sin, cos or tan)

Answer 15

cos( 90 - angle )

Question 16

cos0 = (sin, cos or tan)

Answer 16

sin( 90 - angle )

Question 17

cot0 = (sin, cos or tan)

Answer 17

tan( 90 - angle )

Question 18

cos20 =

Answer 18

cos squared 0 - sin squared 0

Question 19

sin20 =

Answer 19

2 x sin0 x cos0