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Use the half-angle identities to

Use the identities cos^2 x + sin^2 x =1and cos2x=cos^2 x -sin^2 x to show that cos^4 x -sin^4 x = cos2x Im not sure how, I can
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2. asked by Anon
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Solving Trig Functions: How Do You Solve For Sin 7.5 Using Half-Angle and Double-Angle Identities?
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2. asked by Spy[c]
3. 671 views
sin2x-cotx = -cotxcos2xUsing the various trigonometric identities(i.e. double angle formulas, power reducing formulas, half
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2. asked by sam
3. 2,149 views
What is the integral of cos^6x? I tried half angle identities but it didn't really help...
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2. asked by Matt
3. 483 views
Use the half-angle identities to find all solutions on the interval [0,2pi) for the equationcos^2(x) = sin^2(x/2)
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2. asked by Nikki
3. 509 views
Use the half-angle identities to find all solutions on the interval [0,2pi) for the equationsin^2(x) = cos^2(x/2)
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2. asked by Nikki
3. 558 views
Use your knowledge of the half-angle and double-angle identities to simplify the following(4sin(2a))-(2sin(2a))(4sin^2(a))
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2. asked by Addi
3. 501 views
A coil of wire rotating in a magnetic field induces a coltage E=20sin((PIa/4) - (PI/2)). Use an identity to express this in
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2. asked by Blake
3. 1,219 views
1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x.cos 4x 2) Use
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2. asked by CHEYANNE
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1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x.cos 4x 2) Use
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2. asked by marie
3. 672 views