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For DeltaABC , sinA + sinB + sinC...

For `DeltaABC` , sinA + sinB + sinC

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In DeltaABC , if cosA=(sinB)/(2sinC) then show that DeltaABC is an isoscles triangle.

Using vector, Prove that for DeltaABC , (a)/(sinA)=(b)/(sinB)=( c )/(sin C) .

For DeltaABC , prove that, asin(B-C)+bsin(C-A)+csin(A-B)=0 .

In a DeltaABC,3 sin A+4 cos B=6 and 3 cos A+4 sinB=1 , then angleC can be

In DeltaABC,(sinA)/(sinC)=(sin(A-B))/(sin(B-C)) then prove that a^(2),b^(2),c^(2) are in A.P.

If in DeltaABC a = 9 , b = 7 and sinA = 3/4 then DeltaABC is right angle .

DeltaABC ~ DeltaPQR . If AB= 6.5 cm, PQ= 10.4 cm and the perimeter of DeltaABC is 60 cm, then find the perimeter of DeltaPQR .

In DeltaABC, m angleA = 90 , m angle B = 30 and a = 10^@ then b = .........

In DeltaABC , D , E and F are respectively the midpoints of sides AB, BC and CA( see the given figure). Show that DeltaABC is devided into four congruent triangles by joining D, E and F.

KUMAR PRAKASHAN-OBJECTIVE SECTION AS PER NEW PAPER SCHEME -Trigonometric Functions (Fill in the blanks)
  1. cos(pi/3)cos(pi/4) + sin(pi/3) sin(pi/4) .................

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  2. cos((65pi)/4)=.........

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  3. If cot x = - sqrt(5) and x in second quadrant then sin x = ..........

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  4. 2sin((5pi)/12) sin(pi/12)=.........

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  5. The value of (1-tan^(2)(15^(@)))/(1+tan^(2)(15^(@))) is ………..

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  6. If A +B + C = pi then secA (cos B cos C - sin B sin C) = .........

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  7. 3sin(pi/9) - 4sin^(3)(pi/9) = .......

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  8. One root of the equation 6x - 8x^3=sqrt3 is .........

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  9. (sin(3alpha))/(1+2cos(2alpha))= ..........

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  10. cos(47^@) cos (13^@) - sin (47^@) sin(13^@)= .........

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  11. sin((7pi)/(12))cos(pi/4)-cos((7pi)/(12))sin(pi/4)=...........

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  12. Sum of the measure of an angle of cyclic quadrilateral ABCD is ..........

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  13. Solution set of the equation 3 tan^(2) theta + 4 tan theta + 2 =0 is ....

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  14. For DeltaABC , sinA + sinB + sinC

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  15. In DeltaABC, m angleA = 90 , m angle B = 30 and a = 10^@ then b = .......

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  16. In DeltaABC if m angle C = 90^@ than tanA + tanB = .......

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  17. Solution of the equation 2cos x + 1 = 0 is ...........

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  18. Height of the tower and multy storied building is same of 30 mets . Th...

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  19. .......is the angle of elevation of sun if height of building and its ...

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  20. At .........height one can reach by walking x mets with slope 30^@ and...

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