**Learning Enhancement Team Portal**

So Law of Cosines tell us a squared is going to be b squared plus c squared, minus two times bc, times the cosine of theta. And this theta is the angle that opens up to the side that we care about. So we can use theta because we're looking for a. If they gave us another angle right over here, that's not the angle that we would use. We care about the angle that opens up into the side that we... In trigonometry, the law of sines, sine law, sine formula, or sine rule is an equation relating the lengths of the sides of a triangle (any shape) to the sines of its angles.

**Chapter 9 Trigonometry 2 The cosine rule Pearson Africa**

The laws of sines and cosines give you relationships between the lengths of the sides and the trig functions of the angles. These laws are used when you donâ€™t have a right triangle â€” they work in any triangle. You determine which law to use based on what information you have. In general, the side...â€¢ To use the Cosine Rule to find an angle you must be given all three sides â€¢ When deciding whether to use the Sine Rule or the Cosine Rule, always try the Sine Rule first, as it is easier (only one formula to deal with). â€¢ To use the Cosine Rule to find a side you must be given the other two sides and their included angle. â€¢ When dealing with angles in the range 90 < < 180 , i.e

**C entre Trigonometry Flinders University**

Learn cosine sine math with free interactive flashcards. Choose from 500 different sets of cosine sine math flashcards on Quizlet. how to solve for relative frequency how to apply it when they have to work out a side of a triangle. Teach them that, if in a triangle there are no sides and angles opposite each other, the cosine rule must be used. If two sides with the angle between them are given, then they can work out the side opposite the angle by applying the cosine rule as follows: (Opposite side) 2 = (adjacent side) + (other adjacent side)2 âˆ’ 2. How to claim fair work apprentice underpay

## How To Work Out Sine And Cosine Rule

### Learning Enhancement Team Portal

- sine and cosine rule SlideShare
- trigonometry Why doesn't the Sine or Cosine rule work
- 4.6 The sine rule and cosine rule Mathematics resources
- sine and cosine rule SlideShare

## How To Work Out Sine And Cosine Rule

### The sine rule is often less complicated to use than the cosine rule. There is a simple way of checking whether it can be used for a problem. Have a look at the triangles in Fig.13 below. Here, all the measurements marked with a question mark can be found using the sine rule.

- 31/05/2009Â Â· The sine rule and cosine rule work for every triangle (there is no need for it to be right angled) nikki Â· 10 years ago . 2. Thumbs up. 0. Thumbs down. Report Abuse . Comment. Add a comment. Submit Â· just now. if its a right angle triangle, use sohcahtoa. if not, Sine rule is used if you know 2 angles and length of 1 side OR 1 angle and lengths of 2 sides. it works for non right angle
- A handout with a mix of sine and cosine rule questions; students have to work out which to use.
- Learn cosine sine math with free interactive flashcards. Choose from 500 different sets of cosine sine math flashcards on Quizlet.
- angle at cargo is 37 degrees, use the sine rule to get angle at ferry and then use the fact that angle in a triangle add up to 180 and once you got that, use the cosine rule to to get x 0 Reply

### You can find us here:

- Australian Capital Territory: Spence ACT, Callala Beach ACT, Browns Plains ACT, Wallaroo ACT, Macquarie ACT, ACT Australia 2646
- New South Wales: Surfside NSW, Environa NSW, Belmont South NSW, Hovells Creek NSW, Jewells NSW, NSW Australia 2072
- Northern Territory: Driver NT, Berrimah NT, Howard Springs NT, Tipperary NT, Gunn Point NT, Tortilla Flats NT, NT Australia 0848
- Queensland: Parkside QLD, Palm Cove QLD, Banana QLD, Packers Camp QLD, QLD Australia 4026
- South Australia: Parndana SA, Ballast Head SA, Blackwood SA, Hawson SA, Birchmore SA, Hindmarsh SA, SA Australia 5029
- Tasmania: Pyengana TAS, Lower Barrington TAS, Kamona TAS, TAS Australia 7028
- Victoria: Murrindindi VIC, Flynns Creek VIC, Port Albert VIC, Strathmore VIC, Euroa VIC, VIC Australia 3007
- Western Australia: Kintore WA, Shoalwater WA, Buldania WA, WA Australia 6087
- British Columbia: Silverton BC, West Kelowna BC, Warfield BC, Kimberley BC, Nelson BC, BC Canada, V8W 6W6
- Yukon: Snag Junction YT, Scroggie Creek YT, Jakes Corner YT, Dalton Post YT, Glenboyle YT, YT Canada, Y1A 6C5
- Alberta: Gadsby AB, Rockyford AB, Stavely AB, St. Paul AB, Beiseker AB, Bawlf AB, AB Canada, T5K 6J5
- Northwest Territories: Jean Marie River NT, Sambaa K'e NT, Tuktoyaktuk NT, Behchoko? NT, NT Canada, X1A 4L1
- Saskatchewan: Riverhurst SK, Sturgis SK, Earl Grey SK, Carrot River SK, Storthoaks SK, Pleasantdale SK, SK Canada, S4P 1C1
- Manitoba: St. Lazare MB, Carman MB, Morris MB, MB Canada, R3B 1P7
- Quebec: Grenville QC, Blainville QC, Lac-Megantic QC, Normandin QC, Saint-Joseph-de-Beauce QC, QC Canada, H2Y 8W9
- New Brunswick: Salisbury NB, Rogersville NB, Beresford NB, NB Canada, E3B 4H1
- Nova Scotia: Dominion NS, Berwick NS, Cumberland NS, NS Canada, B3J 9S2
- Prince Edward Island: Grand Tracadie PE, Union Road PE, Summerside PE, PE Canada, C1A 2N8
- Newfoundland and Labrador: Baine Harbour NL, English Harbour East NL, Pool's Cove NL, Main Brook NL, NL Canada, A1B 6J5
- Ontario: Sauble Beach South ON, Deloro ON, Newholm ON, Fort Severn, Mansewood ON, Norham ON, Punkeydoodles Corners ON, ON Canada, M7A 4L3
- Nunavut: Gjoa Haven NU, Wager Inlet (Wager Bay) NU, NU Canada, X0A 4H1

- England: Salford ENG, Stafford ENG, Macclesfield ENG, Stourbridge ENG, Woking ENG, ENG United Kingdom W1U 3A5
- Northern Ireland: Derry (Londonderry) NIR, Newtownabbey NIR, Newtownabbey NIR, Belfast NIR, Bangor NIR, NIR United Kingdom BT2 6H7
- Scotland: Dundee SCO, Cumbernauld SCO, Paisley SCO, Dunfermline SCO, Paisley SCO, SCO United Kingdom EH10 8B7
- Wales: Cardiff WAL, Newport WAL, Newport WAL, Swansea WAL, Swansea WAL, WAL United Kingdom CF24 7D5