The equation sin(80°) * csc(80°) equals 1 due to the definition of the cosecant function, where csc(80°) is the reciprocal of sin(80°). Therefore, sin(80°) * (1/sin(80°)) simplifies directly to 1. Additionally, the expression cos(400°) * sec(40°) also equals 1, as cos(400°) is equivalent to cos(40°), and sec(40°) is defined as 1/cos(40°), leading to the same cancellation effect.
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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?