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Convert the products into sum or differe...

Convert the products into sum or difference. If angles are given in degrees, evaluate from tables.
`2 cos 72^(@) sin 56^(@)`

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The correct Answer is:
`0. 5124`
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ICSE-COMPOUND AND MULTIPLE ANGLES -EXERCISE 5 (B)
  1. Convert the products into sum or difference. If angles are given in de...

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  2. Convert the products into sum or difference. If angles are given in de...

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  3. Convert the products into sum or difference. If angles are given in de...

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  4. Convert the products into sum or difference. If angles are given in de...

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  5. Convert the products into sum or difference. If angles are given in de...

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  6. Convert the sums or differences into products: sin 12 A + sin 4 A

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  7. Convert the sums or differences into products: sin 37 ^(@) + sin 21 ...

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  8. Convert the sums or differences into products: sin 12 A - sin 4 A

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  9. Convert the sums or differences into products: cos 79^(@) + cos 11 ^...

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  10. Convert the sums or differences into products: cos 12 alpha + cos 8 ...

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  11. Convert the sums or differences into products: cos 25 ^(@) - cos 37^...

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  12. Convert the sums or differences into products: sin 61^(@) - cos 39^(...

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  13. Convert the sums or differences into products: sin 4x + cos 2x

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  14. Prove that: (sin A+sin B)/(cos A+cos B)=tan((A+B)/2)

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  15. (sin 75^(@) - sin 15 ^(@))/( cos 75^(@) + cos 15 ^(@)) = (1)/(sqrt3)

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  16. (sin 7x + sin 3x )/(cos 7x + cos 3x ) = tan 5x.

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  17. (cos 2B - cos 2 A)/( sin 2 A + sin 2 B) = tan (A -B).

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  18. (sin (4A - 2B) + sin (4B - 2 A))/( cos (4 A - 2 B) + cos (4B - 2 A))= ...

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  19. (cos alpha + 2 cos 3 alpha + cos 5 alpha )/(cos 3 alpha + 2 cos 5 alph...

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  20. ( sin A + sin 3A + sin 5A + sin 7A)/(cos A + cos 3 A + cos 5 A + cos 7...

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