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If sqrt(2)cos A=cos B+cos^3B ,a n dsqrt(...

If `sqrt(2)cos A=cos B+cos^3B ,a n dsqrt(2)sinA=sinB-sin^3B then sin(A-B) `=

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CENGAGE PUBLICATION-TRIGONOMETRIC FUNCTIONS-All Questions
  1. The value of tan6^0tan42^0tan66^0tan78^0 is (a)1 (b) 1/2 (c) 1/...

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  2. In triangle A B C , if angle is 90^0 and the area of triangle is 30 sq...

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  3. If sqrt(2)cos A=cos B+cos^3B ,a n dsqrt(2)sinA=sinB-sin^3B then sin(A...

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  4. In a right angled triangle the hypotenuse is 2sqrt(2) times the perpe...

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  5. A circular ring of radius 3 cm hangs horizontally from a point 4 cm ve...

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  6. If tanbeta=2sinalphasingammacos e c(alpha+gamma), then cotalpha,cotbe...

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  7. tan9^@-tan27^@-tan63^@+tan81^@ is equal to

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  8. Let x=sin1^0, then the value of the expression. 1/(cos0^0dotcos1^0)+...

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  9. If (tan3A)/(tanA)=k(k!=1) then which of the following is not true?

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  10. If x in (pi,(3pi)/2),then 4cos^2(pi/4-x/2)+sqrt(4sin^4x+sin^2 2x) is ...

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  11. If cosx=(2cosy-1)/(2-cosy), where x , y in (0,pi) then tan(x/2)xxcot(y...

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  12. If theta is eliminated from the equations x=a"cos"(theta-alpha) and y=...

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  13. If tanx=b/a , then sqrt((a+b)/(a-b))+sqrt((a-b)/(a+b)) is equal to (...

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  14. Given that (1+sqrt(1+x))tany=1+sqrt(1-x) . Then sin4y is equal to (a...

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  15. If cos2B=(cos(A+C))/("cos"(A-C)), then tanA ,t a n B ,tanC are in (a...

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  16. If ("cos"(x-y))/("cos"(x+y))+("cos"(z+t))/(cos(z-t))=0 , then the val...

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  17. For all theta in [0,pi/2] show that cos(sintheta)gtsin(costheta)

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  18. Given alpha+beta-gamma=pi, prove that sin^2alpha+sin^2beta-sin^2gamma...

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  19. The maximum value of y=1/(sin^6x+cos^6x) is

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  20. The value of cos e c10^0+cos e c50^0-cos e c70^0 is

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