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The correct ratio is: cos a = 7/20 ? cos a = 20/7 sin a = 7/20 sin a = 20/7 The correct opposite operation is: cos a = a = cos-1 (7/20) ? 20 × cos a = 7 20 7 The answer is: cos a = a = 70˚ ? a = cos-1 a = 69˚ 20 7 20 7 The correct ratio is: cos 35 = 75/b cos 35 = b/75 ? sin 35 = b/75 sin 35 = 75/b The correct opposite operation is: 75 × cos 35 = b ? cos 35 = b = 75 / cos 35 75 b The answer is: 75 × cos 35 = b cos 35 = b = 61 cm ? b = 62 cm 75 b The correct ratio is: cos c = 8/3 cos c = 3/8 tan c = 3/8 tan c = 8/3 ? The correct opposite operation is: 3 × tan c = 8 c = tan-1 (8/3) ? tan c = 8 3 c = 70˚ The correct answer is: tan c = c = 69˚ ? c = tan-1 (8/3) 8 3 The correct ratio is: cos 38 = 90/d cos 38 = d/90 tan 38 = 90/d ? tan 38 = d/90 The correct opposite operation is: d × tan 38 = 90 ? tan 38 = tan 38 / 90 = d 90 d The correct opposite operation is: d × tan 38 = 90 tan 38 = d = 90 / tan 38 ? d = 90 × tan 38 90 d The correct answer is: d × tan 38 = 90 tan 38 = d = 115 cm ? d = tan 38 90 d 90 d = 116 cm The correct ratio is: sin 37 = 20/a sin 37 = a/20 ? tan 37 = 20/a tan 37 = a/20 The correct opposite operation is: 20 × sin 37 = a ? sin 37 = a = 20 / sin 37 20 a The correct answer is: 20 × sin 37 = a sin 37 = a = 13 cm a = 12 cm ? 20 a The correct ratio is: cos b = 16/29 cos b = 29/16 sin b = 29/16 sin b = 16/29 ? The correct opposite operation is: sin b = 16 × sin b = 29 b = sin-1 (16/29) ? 16 29 The correct opposite operation is: sin b = b = 34˚ b = 33˚ ? b = sin-1 (16/29) 16 29 The correct ratio is: sin 24 = c/17 sin 24 = 17/c ? tan 24 = 17/c tan 24 = c/17 The correct opposite operation is: c × sin 24 = 17 ? sin 24 = sin 24 / 17 = c 17 c The correct opposite operation is: c × sin 24 = 17 sin 24 = c = 17 × sin 24 c = 17 / sin 24 ? 17 c The correct answer is: c × sin 24 = 17 sin 24 = c = 42 cm ? c = 41 cm c = 17 / sin 24 17 c The correct ratio is: cos d = 48/59 cos d = 59/48 sin d = 48/59 ? sin d = 59/48 The correct opposite operation is: sin d = d = sin-1 (48/59) ? 48 × sin d = 59 48 59 The correct answer is: sin d = d = 54˚ ? d = sin-1 (48/59) d = 55˚ 48 59 |