Tiêu đề UDFs - next gen - Guide - SM solutions_vF.pdf ✅

UDFs Guide (SM) Preliminary Topics a3(a,b,c): angles of triangle opposite the given sides Ex. 1. Find the angles of a triangle with sides of length 3, 4, and 5. Give your answers to the nearest degree. The angles are 37◦ , 53◦ , and 90◦ . Ex. 2. Triangle ABC has AB = 3, BC = 9, and AC = 7. Find angle A in degrees and correct to one decimal place. Angle A is opposite BC, and measures 123.2◦ . as(t1,d,n): sum of first n terms of arithmetic sequence with first term t1 and common difference d Ex. 1. Find the sum of the first 10 terms of an arithmetic sequence with first term -7 and common difference 4. The sum of the first 10 terms is 110. Ex. 2. Find the common difference of an arithmetic sequence if its first term is 12 and the sum of its first 20 terms is 525. The common difference is 1.5. Specialist Maths 3/4 © EdAtlas | Page 1 © EdAtlas