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September 21, 2014

September 21, 2014

Posted by **Theresa** on Friday, April 30, 2010 at 6:40pm.

write the first trigonometric function in terms of the second trigonometric function.

sec x; tan x

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**John**, Friday, April 30, 2010 at 6:43pmthink of sec x as 1/cos x.

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**John**, Friday, April 30, 2010 at 6:45pmoops i take that back

- Trig. -
**John**, Friday, April 30, 2010 at 6:46pmbig hint: sec x is the hypotenuse of a triangle with legs tan x and 1.

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**Reiny**, Friday, April 30, 2010 at 8:09pmfrom

sin^2 Ø + cos^2 Ø = 1

divide each term by cos^2 Ø

sin^2 Ø/cos^2 Ø + 1 = 1/cos^2 Ø

tan^2 Ø + 1 = sec^2 Ø

sec Ø = √(tan^2 Ø + 1)

- Trig. -
**Shayla**, Saturday, May 1, 2010 at 1:33amThank you, Reiny! It helped me a lot.

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