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If (sin8theta.costheta-sin6theta.cos3the...

If `(sin8theta.costheta-sin6theta.cos3theta)/(cos2theta.costheta-sin3theta.sin4theta)=tan(Ktheta)`, then: `K=...`

A

1

B

2

C

3

D

none of these

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The correct Answer is:
B
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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE-MCQs
  1. For any angle theta, costheta+cos(120^@+theta)+cos(120^@-theta)=.........

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  2. cos^2theta+cos^2(120^@+theta)+cos^2(120^@-theta)=.....

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  3. If (sin8theta.costheta-sin6theta.cos3theta)/(cos2theta.costheta-sin3th...

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  4. sqrt(3)cot2 0^(@)-4cos2 0^(@)=

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  5. If A,B,C are the angles of a triangle such that tan A=1 and tan B=2, t...

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  6. If alpha is any real nubmer then: (sin^4alpha+sin^2alpha.cos^2alpha+co...

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  7. If alpha is any real number, then : (sinalpha+cosecalpha)^2+(cosalpha+...

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  8. If Pn=cos^ntheta+sin^ntheta, show that : 2P6-3P4+1=0.

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  9. Evaluate : sin163^@.cos347^@+sin73^@.sin167^@.

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  10. cos^4(pi/8)+cos^4((3pi)/8)+cos^4((5pi)/8)+cos^4((7pi)/8)=

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  11. 1/cos290^@+1/(sqrt3 sin250^@)=

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  12. If tan(pi.costheta)=cot(pi.sintheta), then: cos((pi)/(4)-theta)=..... ...

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  13. (sin^2A-sin^2B)/(sinA.cosA-sinB.cosB)=....

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  14. If x^0=((13pi)/(6))^c, then: x=(a) 300^@ (b) 930^@ (c) 309^@ (d) 390^@

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  15. If y^c=27^@, then: y= (a) ((20pi)/3)^c (b) ((20pi)/3) (c) ((3pi)/20) (...

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  16. The value of cot5^(@)*cot15^(@)* cot 25^(@)* cot 35^(@)* cot45^(@) * c...

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  17. Find the value of sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+..............

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  18. If tanalpha=(1)/(3)andtanbeta=(1)/(2), then: tan(alpha+beta)=

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  19. If cos e ctheta+cottheta=(11)/2 , then t a ntheta=

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  20. If tantheta=(-1)/(sqrt5)andtheta lies in the fourth quadrant, then: co...

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