How does tan^4x-sec^4x equal -2tan^2x-1

Genral solution of:2tan x + 3=0 Solve for x if: 2tan x +3 =0 and x E[-180;180]
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2. asked by Thule
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How does tan^4x-sec^4x equal -2tan^2x-1If someone could please explain to me then that would be awesome. Thank you ^^
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2. asked by Ann
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1)Complete the identitysec Q - 1/sec Q Does this equal -2tan^2Q?
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2. asked by Abbey
3. 371 views
Which of the following functions of x can be integrated with respect to x without integration by parts, and purely using
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2. asked by Alice
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cot^-1(2tan(cos^-18/17))+tan^-1(2tan(sin^-18/17))=tan^-1300/161
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2. asked by hasee
3. 818 views
sin^2x+sin^2tan^2x=tan^2x
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2. asked by becca
3. 408 views
sec^4x-tan^4x=1+2tan^2x
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2. asked by Anonymous
3. 417 views
(sin/sin+1)-(sin/sin-1)=-2tan^2
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2. asked by chance
3. 431 views
cos(2tan^-1(15/8))
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2. asked by Amanda
3. 1,882 views
2tan x + sec x = 4cos x
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2. asked by Vincent
3. 456 views