Formulae: Unit 5 0.0 / 5 ? MathematicsAnglesTrigonometryGCSEEdexcel Created by: annanolanCreated on: 23-12-16 08:51 What do angles on a straight line equal? 180 degrees 1 of 24 What is the exterior angle equal to? the sum of the interior angles at the other two vertices 2 of 24 How do you work out the sum of the interior angles of a polygon? (n-2) x 180 3 of 24 How do you work out the size of an exterior angle in a regular polygon? 360 / number of sides 4 of 24 What is Pythagorus' Theorem? c^2 = a^2 + b^2 5 of 24 What is the sine, cosine or tangent of angle x? SOHCAHTOA 6 of 24 How do you work out the length of the hypotenuse when the angle is 40 degrees and the opposite side is 5cm? sin40 = 5 / x so therefore... x = 5 / sin40 7 of 24 What is the angle of elevation? The angle measured upwards from the horizontal 8 of 24 What is the angle of depression? The angle measured downwards from the horizontal 9 of 24 How do you calculate the missing angle? Using sin-1, cos-1 or tan-1 10 of 24 What is the exact angle of sin30? 1/2 11 of 24 What is the exact angle of sin45? root2 / 2 12 of 24 What is the exact angle of sin60? root3 / 2 13 of 24 What is the exact angle of sin0? 0 14 of 24 What is the exact angle of sin90? 1 15 of 24 What is the exact angle of cos30? root3 / 2 16 of 24 What is the exact angle of cos45? root2 / 2 17 of 24 What is the exact angle of cos60? 1/2 18 of 24 What is the exact angle of cos0? 1 19 of 24 What is the exact angle of cos90? 0 20 of 24 What is the exact angle of tan30? root3 / 3 21 of 24 What is the exact angle of tan45? 1 22 of 24 What is the exact angle of tan60? root3 23 of 24 What is the exact angle of tan0? 0 24 of 24
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