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The expression cos^2(alpha+beta)+cos^2(a...

The expression `cos^2(alpha+beta)+cos^2(alpha-beta)-cos2alpha.cos2beta,` is

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CENGAGE PUBLICATION-TRIGONOMETRIC FUNCTIONS-All Questions
  1. The number of solution of the equation |2sinx-sqrt(3)|^(2cos^(2)x-3cos...

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  2. In triangle A B C ,l e tR=c i r c u m r a d i u s ,r= i n r a d i u ...

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  3. The expression cos^2(alpha+beta)+cos^2(alpha-beta)-cos2alpha.cos2beta,...

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  4. In triangle ABC, if A - B = 120 and R = 8r, where R and r have their u...

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  5. The sum of all the solution in [0,4pi] of the equation tanx+cotx+1=co...

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  6. If f(x , y) satisfies the equation 1+4x-x^2=sqrt(9sec^2y+4cos e c^2y) ...

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  7. Show that 16cos((2pi)/(15))cos((4pi)/(15))cos((8pi)/(15))cos((16pi)/(1...

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  8. A B C is an equilateral triangle of side 4c mdot If R , r, a n d,h are...

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  9. The total number of solutions of loge |sin x| = -x^2 +2x in [0,pi] is...

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  10. If sin^2theta1+sin^2theta2+sin^2theta3=0, then which of the following ...

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  11. The length of the shadow of a vertical pole of height h , thrown by th...

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  12. For real values of 'x' , Which of the following is/are always positiv...

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  13. The total number of solution of sin{x}=cos{x} (where {} denotes the fr...

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  14. In triangle A B C , let /c=pi/2dot If r is the inradius and R is circu...

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  15. If tan^3A+tan^3B+tan^3C=3tanA* tanB*tanC , then prove that triangle A...

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  16. Find the value of x for which 3cosx=x^2-8x+19 holds good.

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  17. The set of all x in ((-pi)/2,pi/2) satisfying |4sinx-1| &lt; sqrt(5) ...

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  18. a triangle A B C with fixed base B C , the vertex A moves such that co...

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  19. Prove that tan 70^@=tan 20^@+2tan50^@

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  20. Show that the equation sintheta=x+1/x is not possible if x is real.

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