The discussion revolves around trigonometric identities, specifically examining why the expression sin(80°) * csc(80°) equals 1, as well as exploring the relationship between cos(400°) and sec(40°).
Some participants have provided guidance on replacing csc(80°) with 1/sin(80°) and have pointed out the relationship between angles, suggesting that cos(400°) is equivalent to cos(40°). There is an ongoing exploration of these identities without a clear consensus yet.
Participants are working under constraints such as the use of mobile devices, which may limit their ability to use standard mathematical symbols. There is also an emphasis on understanding rather than simply stating results.
More precisely, csc(x) = 1/sin(x), so what can you replace csc(80°) by?CrossFit415 said:I'm on mobile so I can't use regular symbols.
Sin80°csc80° = 1 why does this equal one? Is there multiplication involved here?
I know csc = 1/sin
As far as the cosine is concerned, 400° is the same as what standard angle?CrossFit415 said:And I also have trouble doing this...
Cos400° • sec40°= 1 I don't understand how they got one.
No - replace csc80° with 1/sin80°.CrossFit415 said:Replace csc80° with 1/sin? U
CrossFit415 said:I'm on mobile so I can't use regular symbols.
Sin80°csc80° = 1 why does this equal one? Is there multiplication involved here?
I know csc = 1/sin
Mark44 said:As far as the cosine is concerned, 400° is the same as what standard angle?
HallsofIvy said:Yes, so cos(400)= cos(40). Now, what is sec(40) equal to?