Maths formula 0.0 / 5 ? MathematicsTrigonometryGCSEAll boards Created by: rhys321Created on: 28-09-19 11:38 What is Sine? Opposite over Hypotenuse O/H 1 of 15 What is Cos? Adjacent over Hypotenuse A/H 2 of 15 What is Tan? Opposite over Adjacent O/A 3 of 15 When would you use simple Sin, Cos or Tan? To find a missing angle or missing side in a right angle triangle 4 of 15 What is the Sine rule? a/Sine A= b/Sine B= c/Sine C 5 of 15 When would you use the Sine rule? IN a non-right-angle triangle to find a missing side or angle. Normally when you know an angle and the opposite side. 6 of 15 What is the Cosine rule? Cos a = (B² +C²-A²)/ 2BC 7 of 15 When would you use the Cosine rule? When we need to find out a or A, when we know B & C 8 of 15 How do you find the area of a right-angled triangle? 1/2 ⨉ Base ⨉ Height 9 of 15 How do you find the area for a circle? πR² 10 of 15 How do you find out the perimeter of a circle? 2πR 11 of 15 What is the area of a square? length² 12 of 15 What is the area of a rectangle? length ⨉ width 13 of 15 What is the area of any triangle? (apart from a right angled triangle) 1/2 ⨉ Base ⨉ Perpendicular Height 14 of 15 What is the area of a triangle using the trigonometric formula? Area = 1/2 ab sineC 15 of 15
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