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anonymous
 5 years ago
Prove that:
cos(sin^1(x)) = sqrt (1x^2)
anonymous
 5 years ago
Prove that: cos(sin^1(x)) = sqrt (1x^2)

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watchmath
 5 years ago
Best ResponseYou've already chosen the best response.1Let \(a=\cos(\sin^{1} x)\) Then \(a^2+\sin^2(\sin^{1}x)=1\) But remember \(\sin(\sin^{1}(x))=x\) Hence \(a^2+x^2=1\) \(a^2=1x^2\) \(a=\sqrt{1x^2}\) Therefore \(\cos(\sin^{1}(x)=\sqrt{1a^2}\)

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.1I mean \(\cos(\sin^{1}(x))=\sqrt{1x^2}\)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Do you mind if I ask you another question

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.1If you think the answer above helps you please the good answer button :). Post your other question as a new question. If it is interesting, I might help you. But don't worry there are a lot of people who will be able to help you :D.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0lots of posts tonight

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.1wow you already halfway amistre64 medals :D

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.1I don't know I am not as excited as before in answering questions :D

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0well i have to agree. getting old, but my latex is improving by leaps and bounds

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and no amistre is way ahead. i will never catch up

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.1use \ ( \ ) instead of \ [ \ ] to get inline latex, that will make your post more concise :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yo satellite can you go back to this question that you were helping me with? If sin(x) = 1/3 and sec(y) = 5/4 , where x and y lie between 0 and pie/2, evaluate the expression cos(x+y).

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I asked you about how the pathagoras part you did i was a little confused..can you show that work?
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