Chapter 6: Trigonometry (Formulas)

Question 1

The formula for Pythagoras Theorem

Answer 1

P.T,
a² + b² = c²

Question 2

The formula for the Trigonometric Ratios of Sine (sin)

Answer 2

sinθ = O/H
(O = Length of Opposite side, H = Length of Hypothenuse side)
(use tOA cAH sOH if you’re stuck)

Question 3

The formula for the Trigonometric Ratios for Cosine (cos)

Answer 3

cosθ = A/H
(A = Length of Adjacent side, H = Length of Hypothenuse side)
(use tOA cAH sOH if you’re stuck)

Question 4

The formula for the Trigonometric Ratios for Tangent (tan)

Answer 4

tanθ = O/A
(O = Length of Opposite Side, A = Length of Adjacent side, )
(use tOA cAH sOH)

Question 5

State all the formulas of the 3 Trigonometric ratios (Sine, Cosine, and Tangent)

Answer 5

sinθ = O/H
(O = Length of Opposite side, H = Length of Hypothenuse side)

cosθ = A/H
(A = Length of Adjacent side, H = Length of Hypothenuse side)

tanθ = O/A
(O = Length of Opposite Side, A = Length of Adjacent side, )
(use tOA cAH sOH)