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If tan^2((pi-A)/4)+tan^2((pi-B)/4)+tan^2...

If `tan^2((pi-A)/4)+tan^2((pi-B)/4)+tan^2((pi-C)/4)=1` , then ` A B C` is (A) equilateral (B) isosceles (C) scalene (D) none of these

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. If (1+tanalpha)(1+tan4alpha)=2,alpha in (0,pi/(16)), then alpha is e...

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  2. For the equation 1-2x-x^2=tan^2(x+y)+cot^2(x+y) (a)exactly one valu...

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  3. If tan^2((pi-A)/4)+tan^2((pi-B)/4)+tan^2((pi-C)/4)=1 , then A B C is ...

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  4. For the smallest positive values of x \and\ y , the equation 2(sinx+si...

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  5. The minimum vertical distance between the graphs of y=2+sinx and y=cos...

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  6. Find all solution of the equation. sinx+sin(π/8)sqrt((1−cosx)^2+sin^2x...

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  7. Suppose sin^3xsin3x=sum(m=0)^n Cmcosm x is an identity in x , where ...

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  8. Solve tan(picostheta)=cot(pisintheta) then the value of sin(π/4+θ)

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  9. The value of sum(r=0)^(10)cos^3((rpi)/3) is equal to (a)1/4 (b) 1/...

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  10. Solve the equation sin^4x+cos^4x-2sin^2x+(3sin^2 2x)/4=0

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  11. sin^2(A/2)+sin^2(B/2)-sin^2(C/2)=1-2cos(A/2)cos(B/2)sin(C/2)

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  12. solve sin(2x)+sin(x)=0?

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  13. In any triangle ABC, prove that sin^3Acos(B-C)+sin^3Bcos(C-A)+sin^3Cco...

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  14. Find the smallest positive root of the equation sqrt(sin(1-x))=sqrt(co...

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  15. cot16^0cot44^0+cot44^0cot76^0-cot76^0cot16^0= (a)1(b) 2 (c)3 (d) ...

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  16. Solve the equation tan^4x+tan^4y+2cot^2xcot^2y=3+sin^2(x+y) for the va...

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  17. The value of (2sinx)/(sin3x)+(tanx)/(tan3x) is.

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  18. Prove that the equation 2 sin x=|x|+a has no solution for a in ((3sqrt...

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  19. Prove that tanpi/(16)=sqrt(4+2sqrt(2))-(sqrt(2)+1)

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  20. Solve the equation 2sinx+cosy=2 for the value of xa n dydot

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