Trigonometric Ratios of Any Angles and their Signs

What is sin(a)

• x/y

• x/r

• r/y

• y/r

Shiro walks from (0,0) to (5,-2) what is the sin(a)? ( 2 possible answer )

• -2/sqrt(29)

• 5/sqrt(29)

• -2/5

• None of above

sin(30) = cos(60)

• True

• false

Cos(a) = -(4/5), evaluate the sin(a) ( Q3 )

• 3/5

• -(3/5)

• 3/4

• -3/4

Evaluate tan(-480)

• -(1/sqrt(3))

• -sqrt(3)

• 1/2

• sqrt(2)/2

Evaluate sin405

• 2/2

• sqrt(3)/2

• 1/2

• sqrt(2)/2

cos(330°)

• 1/2

• sqrt(2)/2

• sqrt(3)

• sqrt(3)/2

Moji draws a tree from (0,0) to (4,3). Evaluate the cos(a)? (Q1) ( 2 possible answer )

• -(4/5)

• 4/5

• 3/5

• -(3/5)

Alex runs from (0,0) to (12,5). Evaluate tan(a)? (Q1) ( 2 possible answer )

• -(5/13)

• 5/13

• 5/12

• 12/5

JJ kicks the ball from (0,0) to (2,2). Evaluate cos(j) ? (Q1)

• 1

• 2/sqrt(2)

• sqrt(2)/2

• 2/2