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AAKASH SERIES-MULTIPLE & SUBMULTIPLE ANGLES-PRACTICE EXERCISE
- If 4 sin(60^(@) + theta ) sin (60^(@) - theta )-1=k cos 2 theta , th...
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- cos6^(@) cos42^(@) cos66^(@) cos78^(@) =
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- Show that sin""(pi)/5.sin""(2pi)/5.sin""(3pi)/5.sin""(4pi)/5=5/16.
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- cos (pi/7) cos ((2pi)/(7) ) cos ( (4pi )/(7) ) =
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- "sin"pi/14" sin"(3pi)/14" sin"(5pi)/14" sin"(7pi)/5=
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- "sin"^(2)pi/8" + sin"^(2)(3pi)/8" + sin"^(2)(5pi)/8" + sin"^(2)(7pi)/8...
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- "sin"^(4)pi/8" +sin"^(4)(3pi)/8" +sin"^(4)(5pi)/8" +sin"^(4)(7pi)/8=
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- Show that (1+ cos. (pi)/(8))(1+cos. (3pi)/(8))(1+ cos. (5pi)/(8))(1+ c...
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- If A=2 sin^(2) theta - cos 2 theta , then
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- If x+y+z =xyz, then sum(2x)/(1-x^(2))=
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- If xy+yz+zx=1 , then sum(x+y)/(1-xy)=
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- If sqrt(1+sinA)+sqrt(1-sinA)=2"sin"A/2" then"A/2 in
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- If A=340^(@) then 2 sin A//2=
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- I : If 180^(@) lt theta lt 270^@ , sin theta = -3//5 " then " cos the...
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- If A=cos^(2)10^(@)+cos^(2)50^(@)+cos^(2)70^(@), B="sin"^(4)(3pi)/8-"...
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- If A=(2sinx)/(sin3x)+(tanx)/(tan3x), B=cos10^(@)cos30^(@)cos50^(@)cos...
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- Assertion (A): tantheta+2tan2theta+4tan4theta+8tan8theta+16cot16theta=...
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- Assertion (A): cos^(3)x+cos^(3)(120^(@)+x)+cos^(3)(120^(@)-x)=3/4cos3x...
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- If 0ltxltpi and cosx+sinx=1/2 then tanx=
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- If A=sin^(2) theta + cos^(4) theta , then for all values of theta ,...
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