Qualification > Math

Trigonometry

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nid404:

--- Quote from: eddie_adi619 on September 08, 2009, 06:25:21 am ---
--- Quote from: nid404 on September 08, 2009, 04:54:43 am ---one more identity question...it's a little complicated for me to understand
Prove the identity
(cos x + 3 sinx)2 = 5 - 4cos2x + 3 sin2x.

Sir, can u list all the equations we need to know for AS trig...i mean equations relating the three functions (tan,sin and cos)


--- End quote ---
is it 4cos2x and 3sin2x...or 2x

--- End quote ---

2x not superscript

haha master786 i knew astar could do it :P

master786:
yea :P i hav done identities but inedexcel...C2 ..theC3 once might be the level of pure maths ... nd C3 i havent done yet :P
so yea astars the man now :P

nid404:

--- Quote from: master786 on September 08, 2009, 06:39:07 am ---yea :P i hav done identities but inedexcel...C2 ..theC3 once might be the level of pure maths ... nd C3 i havent done yet :P
so yea astars the man now :P

--- End quote ---

no problem master...i can wait

Ghost Of Highbury:

--- Quote from: nid404 on September 08, 2009, 04:54:43 am ---one more identity question...it's a little complicated for me to understand
Prove the identity
(cos x + 3 sinx)2 = 5 - 4cos2x + 3 sin2x.

Sir, can u list all the equations we need to know for AS trig...i mean equations relating the three functions (tan,sin and cos)


--- End quote ---
done
answer in the next post

nid404:

--- Quote from: eddie_adi619 on September 08, 2009, 06:59:50 am ---
--- Quote from: nid404 on September 08, 2009, 04:54:43 am ---one more identity question...it's a little complicated for me to understand
Prove the identity
(cos x + 3 sinx)2 = 5 - 4cos2x + 3 sin2x.

Sir, can u list all the equations we need to know for AS trig...i mean equations relating the three functions (tan,sin and cos)


--- End quote ---
done
answer in the next post

--- End quote ---

Thanks adi...

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