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If A + B + C =pi, prove that : sin A + s...

If `A + B + C =pi`, prove that : `sin A + sin B -sin C = 4 sin frac (A)(2) sin frac (B)(2) cos frac (C)(2)`.

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If A + B + C =180^@ , prove that : sin^2 frac (A)(2)+ sin^2 frac (B)(2)-sin^2 frac (C)(2)=1-2 cos frac (A)(2)cos frac (B)(2)sin frac (C)(2) .

MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
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  3. Find the radian measure corresponding to the following degree measure ...

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  4. Find the radian measure corresponding to the following degree measure ...

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  5. Find the radian measures corresponding to the following degree measure...

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  6. Find the radian measure corresponding to the following grade measure :...

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  8. Find the radian measure corresponding to the following grade measure :...

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  9. Find thedegree measure corresponding to the following measure. (Use pi...

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  10. Find thedegree measure corresponding to the following measure. (Use pi...

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  11. Find thedegree measure corresponding to the following measure. (Use pi...

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  12. Find thedegree measure corresponding to the following measure. (Use pi...

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  17. The vertical angle of an isosceles triangle is 2/3 rd of each of its b...

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  18. In a right-angled triangle, the difference between two acute angles is...

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  19. The wheel of a carriage is 91 cm in diameter and makes 5 revolutions p...

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