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Prove that: tan3A. tan2A. tanA=tan3A-tan...

Prove that: tan3A. tan2A. tanA=tan3A-tan2A-tanA

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Prove that : tan 3A - tan 2A - tan A = tan 3A tan 2A tan A .

Prove that : tan 13A-tan 9A- tan 4A= tan 13A tan 9A tan 4A .

Prove that : tan 7A -tan 5A-tan 2 A = tan 7A tan 5A tan 2A .

If A + B + C =pi/2 , prove that : tan A tan B + tan B tanC +tanC tan A=1 .

If A+B+C=pi , prove that (a) tan 3A+tan3B+tan3C=tan3A tan 3B tan 3C (b) cot""(A)/(2)+cot""(B)/(2)+cot""(C)/(2)=cot""(A)/(2)cot""(B)/(2)cot""(C)/(2)

If A + B + C =180^@ , prove that : tan 2A + tan 2B + tan 2C = tan 2A tan 2B tan 2C .

If A + B + C =180^@ , prove that : tan A + tan B + tan C = tan A tan B tan C .

Prove that : tan 3 theta tan 2 theta tan theta= tan3 theta-tan 2 theta-tan theta .

Prove that : tan 3 theta= (3 tan theta-tan^3 theta)/(1-3 tan^2 theta) .

Prove that : tan 2 theta= (2 tan theta)/(1-tan^2 theta) .

JBD PUBLICATION-MODEL PAPER (8)-EXERICSE
  1. In a single toss of three coins, the probability of getting head and t...

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  2. Find the angle between the minute hand and the hour hand of a clock wh...

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  3. Prove that: tan3A. tan2A. tanA=tan3A-tan2A-tanA

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  4. Find the real numbers x and v if (x -iy) (3 + 5i) is the conjugate of ...

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  5. Prove that the coefficient of x^(n) in (1+x)^(2n) is twice the coeffi...

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  6. Write the middle term in the expansion of (2x^2-1/x)^10.

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  7. A point R with x-co-ordinate 4 lies on the line segment joining the po...

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  8. Find out which of the following sentences are statements and which are...

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  9. Find out which of the following sentences are statements and which are...

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  10. Rewrite the following statement if then in five different ways conveyi...

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  11. There are 210 members in a club. 100 of them drink tea and 65 drink te...

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  12. If y=f(x)=(2x+3)/(5x-2), prove that f(y)=x.

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  13. If sin theta= n sin(theta+2 alpha), show that : tan(theta+ alpha)=(1+n...

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  14. Prove by mathematical induction that 1+3+3^2+…………+3^(n-1)=(3^n -1)/2

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  15. Find the number of words which can be made by using all the letters of...

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  16. If C(n,10)=C(n,12), determine n and hence C(n,5).

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  17. The A.M. between two positive numbers is 34 and their G.M. is 16. find...

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  18. If (a^n+b^n)/(a^(n-1)+b^(n-1)) is the A.M. between a and b, then find ...

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  19. Find the equations of the lines, which pass through the point (4, 5) a...

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  20. Find the area of the triangle formed by the lines joining the vertex o...

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