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1/sec x tan x=csc x-sin x

0 votes

verify this identity step by step?

trigonometric-identities

asked Apr 15, 2014 in TRIGONOMETRY by anonymous

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1 Answer

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RHS = cscx - sinx = 1/sinx - sinx =

(1 - sin²x)/sinx = cos²x/sinx = cosx(cosx/sinx) =

(1/secx)(1/tanx) = 1/(secx tanx) = LHS

Note: 1/secx tanx is NOT correct due to the order of operations. Use parentheses!!

https://answers.yahoo.com

answered Apr 15, 2014 by anonymous

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