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If the angles A,B,C of /\ABC are in A.P....

If the angles A,B,C of `/_\ABC` are in A.P., and its sides a, b, c are in Gp., show that `a^(2) , b^(2), c^(2)` are in A.P.

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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-HARDER SOLVED EXAMPLES
  1. if /\ABC is a right angled at C, evaluate : (a^2 + b^2)/(a^2 - b^2) ...

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  2. If, in a /\ABC, it is given that, a^(4) + b^(4) + c^(4) = 2a^(2) (b^...

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  3. If the angles A,B,C of /\ABC are in A.P., and its sides a, b, c are in...

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  4. If one side of a triangle is double the other, and the angles opposite...

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  5. If, in a /\ABC, it is given that tan A and tan B are the roots of the ...

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  6. If /\ PQR is right-angled at R and tan P/2, tan Q/2 are the roots of t...

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  7. If, in a /\ABC, it is given that a^(2), b^(2), c^(2) are in an A.P., s...

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  8. If p(1),p(2),p(3) are altitude of a triangle ABC from the vertices A,B...

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  9. Triangle ABC is isosceles with AB = AC. If the radius of the cicum-cir...

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  10. If H is the orthocenter of DeltaABC and if AH = x, BH = y, CH = z, t...

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  11. In any triangle A B C , prove that: a^3cos(B-C)+b^3cos(C-A)+c^3cos(A-B...

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  12. If, in a /\ ABC, (2 cos A)/a + (cos B)/(b) + (2 cos C)/(c) = a/(bc) ...

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  13. If, in a /\PQR, right angled at R, tan (P/2) and tan (Q/2) are the r...

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  14. If, in Delta ABC, angle A,B,C are in A.P. And b : c = sqrt(3) : sqrt(2...

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  15. If in a triangle ABC, a=1+sqrt(3)cm,b=2 cm and angleC=60^(@) , then fi...

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  16. If the sides of a triangle are in the ratio 1 : sqrt(3) : 2, then its ...

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  17. If the angles of a triangle are in the ratio 4 : 1: 1, then the ratio ...

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  18. The perimeter of atriangle ABC is 6 times the arihmetic mean of the si...

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  19. A triangle park is enclosed on two sides by a fence and, on the third ...

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  20. If the radius of the circum-circle of an isosceles triangle PQR is equ...

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