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Identify the next line of working: 5 12 x 122 = x2 + 52 x2 = 52 + 122 ? c2 = a2 + b2 52= x2 + 122 Identify the next line of working: 5 12 x x2 = 169 ? x2 = 52 + 122 c2 = a2 + b2 x2 = 25 x2 = 144 Identify the next line of working: 5 12 x x2 = 169 x2 = 52 + 122 c2 = a2 + b2 x = √169 ? x2 = √169 Identify the next line of working: 5 12 x x2 = 169 x2 = 52 + 122 c2 = a2 + b2 x = 13 ? x = √169 x = 169 Identify the next line of working: x 7 15 72 = x2 + 152 152 = x2 + 72 ? c2 = a2 + b2 x2= 72 + 122 Identify the next line of working: x 7 15 225 = x2 225 = x2 + 49 ? 152 = x2 + 72 c2 = a2 + b2 x2= 225 + 49 Identify the next line of working: x 7 15 What is the opposite operation? – 49 ? 225 = x2 + 49 152 = x2 + 72 c2 = a2 + b2 + 49 Identify the next line of working: x 7 15 176 = x2 ? 225 = x2 + 49 -49 152 = x2 + 72 c2 = a2 + b2 176 = x2 + 49 Identify the next line of working: x 7 15 176 = x2 225 = x2 + 49 -49 152 = x2 + 72 x = √176 ? c2 = a2 + b2 x2 = √176 Identify the next line of working: x 7 15 176 = x2 225 = x2 + 49 -49 152 = x2 + 72 x = 13.3 ? x = √176 c2 = a2 + b2 x = 13.2 Understand the working: 50o x 12 (Use the opposite operation to remove ÷12) (Go to your calculator) x Identify the next line of working: tan 34 = 5/x 5 34o cos 34 = x/5 tan 34 = x/5 ? cos 34 = 5/x x Identify the next line of working: 5 34o x × tan 34 = 5 5 × tan 34 = x ? tan 34 = 5/x x Identify the next line of working: 5 34o 5 × tan 34 = x x = 3.4 ? x = 3.3 Identify the next line of working: tan 25 = 32/x 32 25o x tan 25 = x/32 cos 25 = x/32 ? cos 25 = 32/x Identify the next line of working: cos 25 = 32/x 32 25o x cos 25 /32 = x 32 × cos 25 = x ? Identify the next line of working: 32 25o x x = 29.1 32 × cos 25 = x x = 29.0 ? Understand the working: x 62o 12 (Use the opposite operate to remove x tan 62) (Use the opposite operation to remove ÷x) (Go to your calculator) Identify the next line of working: cos 42 = x/58 58 x 42o sin 43 = x/58 cos 42 = 58/x ? sin 42 = 58/x Identify the next line of working: cos 42 = x/58 58 x 42o 58 × cos 43 = x x × cos 42 = 58 ? Identify the next line of working: 58 x 42o x = 58 / cos 42 ? x = 58 ×cos 42 Identify the next line of working: 58 x 42o x = 78.0 ? x = 78.1 18 Identify the next line of working: sin 66 = x/18 x 66o cos 66 = x/18 sin 66 = 18/x ? cos 66 = 18/x 18 Identify the next line of working: sin 66 = x/18 x 66o x = sin 66/18 x × sin 66 = 18 ? 18 Identify the next line of working: x = 18 × sin 66 x 66o x = sin 66/18 x = 18 / sin 66 ? 18 Identify the next line of working: x 66o x = 19.7 ? x = 19.8 Understand the working: 34 θo 21 (Use the opposite operation to remove cos) (Go to your calculator) 25 Identify the next line of working: tan θ = 16/25 16 θo cos θ = 25/16 tan θ = 25/16 ? cos θ = 16/25 25 Identify the next line of working: 16 θo θ = tan–1 25/16 ? θ = tan 16/25 25 Identify the next line of working: 16 θo θ = 57.4 ? θ = 57.3 9 Identify the next line of working: sin θ = 17/9 17 θo cos θ = 17/9 sin θ = 9/17 ? cos θ = 9/17 9 Identify the next line of working: 17 θo θ = sin–1 9/17 ? θ = sin 17/9 9 Identify the next line of working: 17 θo θ = 32.0 ? θ = 31.9 |