Verdubbelingsformules

Question 1

sin (2t)

Answer 1

2 sin (t) * cos (t)

Question 2

1. cos (2t)

Answer 2

1. cos ^2 (t) - sin ^2 (t)

Question 3

2. cos (2t)

Answer 3

2. 2 cos ^2 (t) - 1

Question 4

3. cos (2t)

Answer 4

3. 1 - 2 sin ^2 (t)