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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-EXERCISE-II
- Prove that sqrt3 csc 20 ^(@)- sec 20^(@)=4
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- sin6^(@)sin42^(@)sin66^(@)sin78^(@)=
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- If A=tan6^(@) tan42^(@), B=cot66^(@) cot78^(@) then
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- cos6^(@)sin24^(@)cos72^(@)=
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- Prove that cos. (pi)/(11). cos . (2 pi)/(11). cos . (3 pi)/(11) cos. (...
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- "Cos"(2pi)/15."Cos"(4pi)/15."Cos"(8pi)/15."Cos"(14pi)/15=
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- If 630^@ lt A lt 720^(@) , |tan A|=12//5, " then " tan A//2=
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- Prove that (1+cos""pi/10)(1+cos""(3pi)/10)(1+cos""(7pi)/10)(1+cos""(9p...
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- "cos"^(2)pi/10+"cos"^(2)(2pi)/5+"cos"^(2)(3pi)/5+"cos"^(2)(9pi)/10=
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- Show that cos^4""pi/8+cos^4""(3pi)/8+cos^4""(5pi)/8+cos^4""(7pi)/8=3/2
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- tan9^(@)-tan27^(@)-tan63^(@)+tan81^(@)=
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- x/(costheta)=y/(cos(theta-(2pi)/3))=z/(cos(theta+(2pi)/3)) then x+y+z=
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- The minimum value of cos^(3) x+ cos^(3) (120^(@) + x) + cos^(3) (120^...
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- If x= tan15^(@) , y="cosec"75^@ and z= 4 sin18^(@) , then
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- cos^(2)(alpha+beta)+cos^(2)(alpha-beta)-cos2alpha cos2beta=
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- If cos^(3) theta + cos^(3)((2pi)/(3) + theta) + cos^(3)((4pi)/(3) + th...
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- If tan(theta/2)=cosec theta-sintheta then the numerical balue of "cos"...
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- If cos theta = (cos alpha - cos beta)/(1-cos alpha cos beta), then one...
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- If x+y+z=xyz , " then " sum(3x-x^(3))/(1-3x^(2))=
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- tan ""7(1^@)/(2)=
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