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If u(n) = cos^(n) alpha + sin^(n) alpha ...

If `u_(n) = cos^(n) alpha + sin^(n) alpha` , then the value of `2 u_(6) - 3 u_(4) +1` is :

A

1

B

5

C

0

D

`-1`

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The correct Answer is:
A
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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-TRIGONOMETRY -EXERCISES (Multiple Choice Questions)
  1. Find the value of 2(sintheta^(6)+cos^(6)theta)-3(sin^(4)theta+cos^(4...

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  2. Find the value of 2(sin^(6)theta+cos^(6)theta)-3(sin^(4)theta+cos^(4...

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  3. If u(n) = cos^(n) alpha + sin^(n) alpha , then the value of 2 u(6) - 3...

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  4. If (sectheta+tantheta)/(sectheta-tantheta)=2(51)/(79), then sintheta w...

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  5. If sintheta+sin^(2)theta=1, then find the value of cos^(2)theta+cos^(4...

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  6. If costheta+cos^(2)theta=1, then find the value of sin^(4)theta+sin^(2...

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  7. If cosA+cos^(2)A=1, then find the value of sin^(8)A+2sin^(6)A+sin^(4)A...

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  8. If cosA+cos^(2)A=1, then find the value of sin^(12)A+3sin^(10)A+3sin^(...

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  9. If sinA+sin^(2)A=1, then find the value of cos^(12)A+3cos^(10)A+3cos^(...

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  10. If cos^(2)x+cos^(4)x=1, then find the value of tan^(2)x+tan^(4)x.

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  11. If 3sinx+4cosx=2, then find the value of 3cosx-4sinx.

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  12. If costheta-sintheta=sqrt(2)costheta, then find the value of costheta+...

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  13. If sintheta+costheta=sqrt(2), then find the value of sintheta-costheta...

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  14. If sintheta+costheta=pandsectheta+cosectheta=q, then q(p^(2)-1)=?

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  15. If T(n)=sin^(n)theta+cos^(n)theta then (T(3)-T(5))/(T(1))=?

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  16. If x=acos^(3)theta,y=bsin^(3)theta then ((x)/(a))^((2)/(3))+((y)/(b))^...

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  17. If x=asec^(n)thetaandy=btan^(n)theta, then find the value of theta.

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  18. If tan^(5)thetatan^(5)5theta=1, then find the value of tan^(4)3theta.

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  19. If tantheta.tan2theta=1, then find the value of sin^(2)2theta+tan^(2)2...

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  20. If costhetacosec23^(@)=1, the value of theta is

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