Sec^2(u/2)=(2sec(u))/(sec(u)+1)

Could someone please help with this question.State the properties of y = 2sec(-2x + 180°) + 3. My answer: First I graphed y =
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2. asked by Matt
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Prove that the following Trigonometric Identity is valid:1/(sin⁡(y)-1)-1/(sin⁡(y)+1)=-2sec^2 (y) Please any help or clues on
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2. asked by kat
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Am I right on this?2sec^2(2x)-8=0 2sec^2(2x)=8 divide by 2 sec^2(2x)=4 find square root sec(2x)=2 Now, would this simply be
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2. asked by Alex
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t=2sec, s=2m,v=?
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2. asked by Abinet
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tan^2(x)=-3/2sec(x)
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2. asked by Blair
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Sec^2(u/2)=(2sec(u))/(sec(u)+1)
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2. asked by Dax
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cos x/1+sin x + 1+sin x/ cos x= 2sec x
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2. asked by val
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f(x)= 2sec(x-3.14/4)-1
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2. asked by rlw
3. 395 views
2sec(11)sec(19)-2cot(71)
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2. asked by hridya
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prove that tan(π/4+x/2)+tan(π/4-x/2)=2sec x
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2. asked by abcd
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