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RD SHARMA-SINE AND COSINE FORMULAE AND THEIR APPLICATIONS-Solved Examples And Exercises
- Two boats leave a place at the same time. One travels 56 km in the dir...
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- In any triangle A B C , prove that: a^3cos(B-C)+b^3cos(C-A)+c^3cos(A-B...
07:12
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- With usual notations, if in a triangle A B C(b+c)/(11)=(c+a)/(12)=(a+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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- If in a triangle A B C ,cosA+2cosB+cosC=2 prove that the sides of the ...
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- In a triangle A B C ,/C=60^@, then prove that: 1/(a+c)+1/(b+c)=3/(a+b+...
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- b(cosA-acosC)=c^2-a^2
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- 2(bc cosA+c acosB+a bcosC)=a^2+b^2+c^2
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- In a A B C , if /B=60^@ , prove that (a+b+c)(a-b+c)=3c a
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- In any DeltaABC , prove that: (sinB)/(sinC)=(c-acosB)/(b-acosC)
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- In any A B C , prove that: 2{asin^2C/2+csin^2A/2}=a+c-b
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- In any A B C , prove that: 2{b cos^2(C/2) + c cos^2(B/2)}=a+c+b
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- 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...
02:26
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- If a^2,b^2,c^2 are in A.P., prove that cotA ,cotB ,cotC are in AdotPdo...
02:50
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- In any triangle A B C , prove that: (1+cos(A-B)cos C)/(1+cos(A-C)cos B...
03:01
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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
03:10
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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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