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If un=sin^("n")theta+cos^ntheta, then pr...

If `u_n=sin^("n")theta+cos^ntheta,` then prove that `(u_5-u_7)/(u_3-u_5)=(u_3)/(u_1)` .

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. If y=(sin^4x-cos^4x+sin^2xcos^2x)/(sin^4x+cos^4x+sin^2xcos^2x),x in (0...

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  2. In an acute angled triangle A B C ,r+r1=r2+r3a n d/B >pi/3, then (a) b...

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  3. If un=sin^("n")theta+cos^ntheta, then prove that (u5-u7)/(u3-u5)=(u3)/...

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  12. The number of solutions of the equation 1+cosx+cos2x+sinx+sin2x+sin3x=...

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  13. Let us consider the equation cos^4x/a+sin^4x/b=1/(a+b),x in[0,pi/2],a,...

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  20. In triangle A B C , if r1=2r2=3r3, then a : b is equal to 5/4 (b) 4/5...

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