Trigonometric proof
Please help with this trigonometric proof!
Prove that 2sinxcosx/tanx = 2-2sin^2(x)
Prove that 2sinxcosx/tanx = 2-2sin^2(x)
Original post by Mr M
Please don't post full solutions.
It's considered poor form to work on both sides of an identity at the same time. Start on one side and work towards the other.
It's considered poor form to work on both sides of an identity at the same time. Start on one side and work towards the other.
Sorry! And I don't think I worked on both sides at the same time? I worked from the LHS
Original post by gcsemusicsucks
Sorry! And I don't think I worked on both sides at the same time? I worked from the LHS
You didn't - it was my mistake, my head doesn't rotate 90 degrees very easily.
Original post by gcsemusicsucks
Sorry! And I don't think I worked on both sides at the same time? I worked from the LHS
Could you edit and remove your solution and just give a hint
Original post by olympiad1357
Please help with this trigonometric proof!
Prove that 2sinxcosx/tanx = 2-2sin^2(x)
Prove that 2sinxcosx/tanx = 2-2sin^2(x)
Division by tan is the same as multiplication by cot. Also consider using Pythagoras' identity.
Original post by olympiad1357
Please help with this trigonometric proof!
Prove that 2sinxcosx/tanx = 2-2sin^2(x)
Prove that 2sinxcosx/tanx = 2-2sin^2(x)
Could you perhaps use any trigonometric identities to help you move in the right direction?
Original post by Desmos
Division by tan is the same as multiplication by cot. Also consider using Pythagoras' identity.
I think talking about cot would be overcomplicating things. But yes Pythagoras' identity would be useful.
(edited 6 years ago)
Quick Reply
Related discussions
- Advanced mathematics
- 2022 Edexcel Maths GCSE (Higher) Checklist
- HNC math question.
- Edexcel A Level Further Mathematics Paper 4A (9FM0 4A) - 26th June 2023 [Exam Chat]
- GCSE Edexcel Maths - trigonometric ratios of angles between 0 and 360
- Maths
- A level trigonometric proof question
- A level integration help
- trigonometric functions+ transforming graphs the formulas.
- SHM
- is A level maths/ further maths just a matter of memorising random equations
- Maths yr2 trig help
- Isaac Physics help
- A level maths
- cubic function, different ways of solving it?
- Integration question
- Trigonometric identity
- Trigonometric Modelling
- Trigonometric identities
- Trigonometric Identities
Latest
Trending
Last reply 2 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
Trending
Last reply 2 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
