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The absolute value of the expression tan...

The absolute value of the expression `tan(pi/(16))+tan((5pi)/(16))+tan((9pi)/(16))+tan((13pi)/(16))` is ______

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. Suppose A and B are two angles such that A , B in (0,pi) and satisfy s...

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  2. If "cot"(alpha+beta)=0, then "sin"(alpha+2beta) can be (a)-sinalpha...

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  3. The absolute value of the expression tan(pi/(16))+tan((5pi)/(16))+tan(...

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  4. Prove that: (sin2theta)/(1+cos2theta)=tantheta

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  5. If A and B are acute positive angles satisfying the equations 3 sin^(2...

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  6. The roots of the equation 4x^2-2sqrt(5)x+1=0,a r e (a)sin36^0,sin18...

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  7. If x , y in R satisfies (x+5)^2+(y-12)^2=(14)^2, then the minimum v...

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  8. In triangle A B C , if sinAcosB=1/4 and 3t a n A=t a n B ,t h e ncot^...

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  9. the least positive value of x satisfying ( sin^(2) 2x + 4 sin^(4) x...

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  10. Prove that tan(pi/16)+2tan(pi/8)+4=cot (pi/16) .

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  11. Show that sqrt[2+sqrt[2+2cos4theta]]=2costheta

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  12. Prove that:(sec8theta-1)/(sec4theta-1)=(tan8theta)/(tan2theta)

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  13. If sinalpha+sinbeta=a and cosalpha+cosbeta=b , prove that tan((alpha...

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  14. If t a ntheta/2=sqrt((a-b)/(a+b))tanvarphi/2 , prove that costheta=(a ...

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  15. Prove that: cos^4pi/8+cos^4(3pi)/8+cos^4(5pi)/8+cos^4(7pi)/8=3/2

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  16. If pi < x < 2pi, prove that (sqrt(1+cosx)+sqrt(1-cosx))/(sqrt(1+...

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  17. If f(x)=2(7cosx+24sinx)(7sinx-24cosx), for every x in R , then maximu...

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  18. If costheta=cosalphacosbeta , prove that t a n(theta+alpha)/2t a n(th...

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  19. Prove that sqrt(sin^4x+4cos^2x)-sqrt(cos^4x+4sin^2x)=cos2xdot

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  20. If cos^2A+cos^2B+cos^2C=1, t h e n ABC is (a)equilateral (b) isoscele...

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