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if sin^4alphacos^2alpha=underset(k=0)ove...

if `sin^4alphacos^2alpha=underset(k=0)overset3sum c_kcos2kalpha` then `c_1+c_3=….c_0+c_2=…..and c_0+c_1+c_2+c_3`=……`.are

A

0,1,2

B

0,0,0

C

0,2,3

D

0,-1,2

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B
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PATHFINDER-TRIGONOMETRIC RATIOS AND IDENTITIES-QUESTION BANK
  1. No.of solution in the equation x=4 sinx when x in [0,2pi]

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  2. The value of sin 10^@+sin 20^@+sin30^@+…..+sin360^@ is equal to

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  3. if sin^4alphacos^2alpha=underset(k=0)overset3sum ckcos2kalpha then c1+...

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  4. The integer k for which the equation 7cosx+5sinx=2k+1 has a solution i...

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  5. For +ve integer n, letfn(theta)=tan(theta/2)(1+sectheta)(1+sec2theta)(...

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  6. If x=secphi-tanphi and y=cosecphi+cotphi, then

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  7. If sectheta+tantheta=1 then one root of equation a(b-c)x^2+b(c-a)x+c(a...

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  8. if cosx+secx=(-2) then for a positive integer n cos^nx+sec^nx is

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  9. sec^2theta=4xy/(x+y)^2 is true if and only if

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  10. If tanx=(2b)/(a-c), (a ne c) y=acos^2x+2bsinxcosx+csin^2x and z=asin...

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  11. If secA+tanA=3/2 then

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  12. If tantheta=(sin alpha-cos alpha)/(sinalpha+cosalpha)1 then

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  13. The value of cos(pi/15)cos(2pi/15)cos(3pi/15)cos(4pi/15)cos(5pi/15)cos...

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  14. The value of cos((2pi)/7)cos((4pi)/7)cos((6pi)/7) is

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  15. The value of sin (pi/14)sin(3pi/14)sin(5pi/14)sin(7pi/14)sin(9pi/14)si...

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  16. If Pn=sin^ntheta+cos^ntheta where n in W (whole number)and theta in R ...

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  17. If Pn=sin^ntheta+cos^ntheta where n in W (whole number)and theta in R ...

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  18. If Pn=sin^ntheta+cos^ntheta where n in W (whole number)and theta in R ...

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  19. if f(theta)=acostheta+bsintheta then -sqrt(a^2+b^2)lef(theta)lesqrt(a^...

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  20. if f(theta)=acostheta+bsintheta then -sqrt(a^2+b^2)lef(theta)lesqrt(a^...

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