Revise trigonometric ratios of sine, cosine and tangent and calculate angles in right-angled triangles with this Bitesize GCSE Maths Edexcel guide.

Sin θ - Ratio of Perpendicular to Hypotenuse Cos θ - Ratio of Base to Hypotenuse Tan θ - Ratio of Perpendicular to Base Tips and Tricks to Learn Trigonometric Formulas, Table and Signs Easily ...

Pages Sin, cos and tan Before we can use trigonometric relationships we need to understand how to correctly label a right-angled triangle.

Well, there's a GIF for that: Wikimedia Next, think about the relationship between sine, cosine and the circle. Here's an illustration of the fundamental relationship between the three.

Q2. If sin ⍬ =x and sec⍬ = y, then tan ⍬ is equal to Q3. If Cos A = ⅗, find the value of 9 + 9 tan 2 A Q4. If 0 ≤ A, B ≤ 900 such that Sin A = ½ and Cos B = ½ , A + B = Q5.