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Trig Sin(2x)tan(x)+cos(2x )=1

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Prove these Trig identities 1) sec x - cos x = (tan x)(sin x) 2) (tan x- cot x) / ((sin x)(cos x)) = (sec^2 x) - (csc^2...

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divadssdavid

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Submitted 139 days ago...

Riled951

New User (6)

Trig indentity

1) (sin0+cos0)^2 + (sin0 - cos0)^2 =2

2) 9sec^2 0 - 5tan^2 0 = 5+4sec^2 0

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Answer 1 / 2 - Submitted 137 days ago...

divadssdavid

Contributor (110)

Hello,

I believe the second identity might be incorrect, please check it for typos.

Recall that

sec(x) = 1/cos(x)
csc(x) = 1/sin(x)
cot(x) = 1/tan(x)

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Answer 2 / 2 - Submitted 137 days ago...

divadssdavid

Contributor (110)

Hello

Recall that

sec(x) = 1/cos(x)
csc(x) = 1/sin(x)
cot(x) = 1/tan(x)

I apologize, I was incorrect above, the second identity is correct.

I hope this helps! : )

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Trig indentity

1) (sin0+cos0)^2 + (sin0 - cos0)^2 =2 2) 9sec^2 0 - 5tan^2 0 = 5+4sec^2 0

1) (sin0+cos0)^2 + (sin0 - cos0)^2 =2

2) 9sec^2 0 - 5tan^2 0 = 5+4sec^2 0