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MBD PUBLICATION-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-QUESTION BANK
- Find square root of 4ab -2(a^2-b^2) sqrt(-1)
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- Find the values of cos 72^@..........
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- Find the value of cos 36^@.
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- Evaluate "cos"(2pi)/17 "using the equation "x^17-1=0
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- Solve the equation z^7=1
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- Solve the equation z^3=i
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- Solve the equation z^6=-i
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- Solve the equationz^3=1+i
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- Given cos alpha+cos beta +cos gamma=sin alpha+sin beta +sin gamma=0 S...
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- If sin alpha + sin beta +sin gamma=0 =cos alpha+cos beta+cos gamma=0 "...
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- If x+1/x=2cos theta,"Show that"x^n+1/x^n=2cos n theta
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- xr=cos alphar+isinalphar. r=1,2,3 "and" x1+x2+x3=0 "Show that" 1/x1+1...
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- Show that ((1+sintheta+icostheta)/(1+sintheta-icostheta))^n =cos((npi)...
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- If alpha "and" beta "are roots "x^2-2x+4=0 "then show that"alpha^n+bet...
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- For a positive integer n show that (1+i)^n+(1-i)^n=2^((n+2)/2) "cos((n...
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- For a positive integer n show that (1+isqrt3)^n+(1-isqrt3)^n=2^(n+1) "...
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- Letx+1/x=2cos alpha, y+1/y=2cos beta z+1/z=2cosgamma."Show that"2 "co...
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- Letx+1/x=2cos alpha, y+1/y=2cos beta z+1/z=2cosgamma."Show that"2 "co...
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- Solve x^9+x^5-x^4=1
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- Find the general value of theta" if"(cos theta+isintheta)("cos"2theta+...
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