If the cos 23° = two thirds, then the sin 67° = .

two thirds, because the angles are complementary
one half, because the angles are complementary
three halves, because the angles are supplementary
1, because the angles are complementary

Two thirds, because the angles are complementary

Step-by-step explanation:

If , you can find sine. The cosine ratio is  . It is very helpful to make a model. The sine ratio is   . If the length adjacent to 23° is 2, then this is the length opposite angle 67° is also 2. The hypotenuse is 3. So the sine is .

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)