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RD SHARMA-SINE AND COSINE FORMULAE AND THEIR APPLICATIONS-Solved Examples And Exercises
- In any A B C , prove that: (b+c)cos A+(c+a)cos B+(a+b)cos C=a+b+c
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- For any triangle ABC, prove that a(bcosC-c cosB)=b^2-c^2
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- In a Delta A B C ,if a=2,/B=60^@a n d/C=75^@ , then b= (a)sqrt(3) (b...
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- If a^2,b^2,c^2 are in A.P., prove that cotA ,cotB ,cotC are in AdotPdo...
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- In any triangle A B C , prove that: (1+cos(A-B)cos C)/(1+cos(A-C)cos B...
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- If in a A B C ,(a^2-b^2)/(a^2+b^2)=(sin(A-B))/(sin(A+B) , prove that ...
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- In any triangle A B C , prove that: acosA+bcosB+c cosC=2asinBsinC
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- In any triangle A B C , (b-c)cot A/2+(c-a)cot B/2+(a-b)cot C/2 =0
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- If in a A B C ,(sinA)/(sinC)=(sin(A-B))/(sin(B-C) , prove that a^2,b^...
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- In a triangle A B C , if acosA=bcosB , show that the triangle is eithe...
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- If in triangle the angles are in the ratio as 1:2:3 , prove that the ...
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- In the sides of a triangle are in the ratio 1:sqrt(3):2, then the meas...
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- In any triangle A B C , prove that: (a^2sin(B-C))/(sinB+ sin C)+(b^2...
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- The angles of a triangle A B C are in AdotPdot and it is being given t...
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- In A B C , prove that (a – b)^2 cos^2 C/2 + (a + b)^2 sin^2 C/2 =c^2d...
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- In a A B C , if a=3,b=5 and c=7,find cos A ,cos B and cos C
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- If the sides a ,b ,c of a triangleABC are in HP, prove that sin^2(A/2)...
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- A person observes the angle of elevation of the peak of a hill from a ...
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- If in a triangle A B C , (2cosA)/a+(cos B)/b+(2cosC)/c=a/(b c)+b/(c a)...
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- In a triangle A B C , if cos A=(sinB)/(2sinC) , show that the triangle...
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