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anton6846
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#1
Hi, I'm stuck on a few trig eq. Q out the textbook;
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
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RDKGames
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#2
(Original post by anton6846)
Hi, I'm stuck on a few trig eq. Q out the textbook;
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
Hi, I'm stuck on a few trig eq. Q out the textbook;
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
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Dysf(x)al
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#3
(Original post by anton6846)
Hi, I'm stuck on a few trig eq. Q out the textbook;
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
Hi, I'm stuck on a few trig eq. Q out the textbook;
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
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anton6846
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#4
(Original post by RDKGames)
If you want help rearranging, just post your attempt at the rearrangement and we'll tell you exactly where the errors lie.
If you want help rearranging, just post your attempt at the rearrangement and we'll tell you exactly where the errors lie.
(Original post by TheMindGarage)
For the first one, have you tried expressing sin2x in terms of cosx? Think about identities.
For the first one, have you tried expressing sin2x in terms of cosx? Think about identities.
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RDKGames
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#5
(Original post by anton6846)
Well I've moved pi to the RHS and divided by 3 but I know this is wrong?
Well I've moved pi to the RHS and divided by 3 but I know this is wrong?
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the bear
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NatalieDouglas
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(Original post by anton6846)
Hi, I'm stuck on a few trig eq. Q out the textbook;
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
Hi, I'm stuck on a few trig eq. Q out the textbook;
Solve the equation 3sin^2x=1+5cosx in the range 0-180
Solve the equation cos(3x-pi)=-1
I understand everything else I just need help in rearranging the equations (possibly using the identities) to find x! I can't quite get it right, help would be appreciated, ty.
-A
http://studywell.com/maths/pure-math...ric-equations/
Hope that helps.
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