Optellingsformulles

Question 1

Cos( α + β)

Answer 1

cos α x cos β - sin α x sin β

Question 2

Sin( α + β)

Answer 2

Sin α x cos β + cos α x sin β

Question 3

Tan( α + β)

Answer 3

Tan α + tan β / 1-tan α x tan β

Question 4

Cos( α - β)

Answer 4

cos α x cos β + sin α x sin β

Question 5

Sin( α-β)

Answer 5

Sin α x cos β - cos α x sin β

Question 6

Tan( α-β)

Answer 6

Tan α - tan β / 1+tan α x tan β