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If 2cosx+sinx=1, then find the value of...

If `2cosx+sinx=1,` then find the value of `7cosx+6sinxdot`

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. If 2tan^2x-5secx=1 is satisfied by exactly seven distinct values of x ...

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  2. In triangle A B C ,tanA+tanB+tanC=6a n dtanAtanB=2, then the values o...

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  3. If 2cosx+sinx=1, then find the value of 7cosx+6sinxdot

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  4. If sinx+sinygeqcosacosxAA in R , then siny+cosa is equal to

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  5. If alpha,beta,gamma are acute angles and costheta=sinbeta//sinalpha,co...

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  6. In triangle ABC, if cotA⋅cotC= 1 / 2 and cotB⋅cotC= 1 / 18 , then ...

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  7. Find the values of xa n dy for which cosec theta=(x^2-y^2)/(x^2+y^2) i...

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  8. The set of all x in the interval [0,pi] for which 2sin^2x-3sinx+1geq0 ...

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  9. If in a triangle (1-(r1)/(r2))(1-(r1)/(r3))=2 then the triangle is rig...

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  10. sum(n=1)^ootan(theta/(2^n))/(2^(n-1)cos(theta/(2^(n-1)))) is

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  11. A parallelogram containing a 60^0 angle has perimeter p and its longer...

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  12. If r/(r1)=(r2)/(r3), then (a) A=90^0 (b) B=90^0 (c) C=90^0 (d) none ...

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  13. If sin(sinx+cosx)=cos(cosx-sinx), and largest possible value of sinx ...

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  14. If 0lt=xlt=pi/3 then range of f(x)=sec(pi/6-x)+sec(pi/6+x) is

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  15. For each natural number nlt=2, prove that sinx1cosx2+sinx2c0sx+3++sinx...

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  16. The values of x1 between 0 and 2pi , satisfying the equation cos3x+c...

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  17. If y=(sin^4x-cos^4x+sin^2xcos^2x)/(sin^4x+cos^4x+sin^2xcos^2x),x in (0...

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

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

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  20. If x ,y in R and x^2+y^2+x y=1, then find the minimum value of x^3y+x...

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