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In /\ABC, a=2, b=3, c=4, prove that the ...

In `/_\ABC`, `a=2`, `b=3`, `c=4`, prove that the triangle is obtuse angled.

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CHETANA PUBLICATION-Trignometric Functions-EXERCISE
  1. Find the ratio of sides of a 30^@-60^@-90^@ triangle

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  2. In /\ABC, a=2, b=3 and sinA = frac{2}{3}, find B

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  3. In /\ABC, a=2, b=3, c=4, prove that the triangle is obtuse angled.

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  4. In /\ABC A = 60^@, b=3, c=8, find a

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  5. In /\ABC, A = 60^@, a=7, find circum radius

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  6. In /\ABC, if a=13, b=14, c=15 then find the value of: cosA

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  7. In /\ABC, if a=13, b=14, c=15 then find the value of: sin(frac{A}{2})

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  8. In /\ABC, if a=13, b=14, c=15 then find the value of: cos(frac{A}{2})

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  9. In /\ABC, if a=13, b=14, c=15 then find the value of: tan(frac{A}{2})

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  10. In /\ABC, if a=13, b=14, c=15 then find the value of: A(/\ABC)

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  11. In /\ABC, if a=13, b=14, c=15 then find the value of: sinA

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  12. In /\ABC, prove that cot(frac{A}{2})+cot(frac{B}{2})+cot(frac{C}{2}) =...

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  13. Find the principal values of the following: sin^-1(frac{1}{sqrt2})

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  14. Find the principal values of the following: cos^-1(frac{sqrt3}{2})

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  15. Find the principal values of the following: cot^-1(frac{1}{sqrt3})

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  16. Find the principal values of the following: sec^-1(2)

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  17. Find the principal values of the following: cosec^-1(sqrt2)

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  18. Find the principal values of the following: tan^-1(-1)

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  19. Find the value of the following: sin^-1(sin(frac{5pi}{3}))

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  20. Find the value of the following: sin(cos^-1(frac{-1}{2}))

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