trig double angle help | Revision Server | Page 1

wicked beacon Jan 30, 2024, 10:40 AM

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arctic hearth Jan 30, 2024, 10:45 AM

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@wicked beacon

wicked beacon Jan 30, 2024, 10:49 AM

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arctic hearth

can you use different identities and still get the right answer?

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but ty i appreciate you fr

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how does it become sec^2 after you cancel out the sin^2?

arctic hearth Jan 30, 2024, 10:54 AM

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wicked beacon can you use different identities and still get the right answer?

yeah! tho somehow u gotta get ur 2theta to become a q theta

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1 theta

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so it’s pretty much gotta be double angle

wicked beacon Jan 30, 2024, 10:54 AM

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yeah definitely double angle

arctic hearth Jan 30, 2024, 10:54 AM

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but with these sorts of identity problems there’s normally a few solutions

wicked beacon Jan 30, 2024, 10:54 AM

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yeah

arctic hearth Jan 30, 2024, 10:54 AM

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wicked beacon how does it become sec^2 after you cancel out the sin^2?

it’s 1/cos^2

wicked beacon Jan 30, 2024, 10:55 AM

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i actually like your identities though i think ill stick to them

arctic hearth Jan 30, 2024, 10:55 AM

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which u can rewrite as (1/cos)^2

wicked beacon Jan 30, 2024, 10:55 AM

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arctic hearth it’s 1/cos^2

ohh shit

arctic hearth Jan 30, 2024, 10:55 AM

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which hopefully is easier to see that that’s sec^2

wicked beacon Jan 30, 2024, 10:55 AM

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im so bad at identities

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forgot that = sec^2x

arctic hearth Jan 30, 2024, 10:55 AM

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nahhhh it’s ok it takes time lol

wicked beacon Jan 30, 2024, 10:55 AM

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worst topic in pure by far imo

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never understood it

arctic hearth Jan 30, 2024, 10:56 AM

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yeah theres a fair bit to remember dw

wicked beacon Jan 30, 2024, 10:56 AM

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even once i remember

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i never know what to do

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and its such a big topic too urgh

#trig double angle help