Home
Class 12
MATHS
Prove that 4(cos66^(@)+sin84^(@)) = sqrt...

Prove that `4(cos66^(@)+sin84^(@)) = sqrt(3) + sqrt(15)`.

Promotional Banner

Topper's Solved these Questions

  • IPE SCANNER (TEXUAL BITS)

    SRISIRI PUBLICATION|Exercise Very Short Questions (2 marks) (Hyperbolic Functions)|23 Videos

  • IPE SCANNER (TEXUAL BITS)

    SRISIRI PUBLICATION|Exercise Very Short Questions (2 marks) (Product of vectors )|73 Videos

  • IPE SCANNER (TEXTUAL BITS)

    SRISIRI PUBLICATION|Exercise APPLICATIONS OF DERIVATIVES|48 Videos

  • IPE-MARCH-2016[TS]

    SRISIRI PUBLICATION|Exercise Section-c(III . Answer any five of the following LAQs:)|6 Videos

Similar Questions

Explore conceptually related problems

cos 66^(@) + sin 84^(@) =

Prove that cos 48^(@) . Cos 12^(@) =(3+sqrt5)/(8) .

Prove that Sin105^(@)=(sqrt(3)+1 )/ (2sqrt(2))=Cos15^(@)

Prove that cos20^(@)cos40^(@)-sin5^(@)sin25^(@)=(sqrt(3)+1)/4

Prove that cos105^(@)=((1-sqrt(3))/(2sqrt(2)))=-Sin15^(@)

Prove that cos 20^(@) cos 40^(@) - sin5^(@) sin 25^(@) = (sqrt(3)+1)/(4) .

Prove that sin 78^(@) + cos132^(@) = (sqrt(5)-1)/(4) .

Solve sin x + sqrt(3) cos x = sqrt(2) .

Prove that sin21^(@)cos9^(@)-cos84^(@)cos6^(@)=1/4 .

Prove that Cos15^(@)=(sqrt(3)+1)/(2sqrt(2))=Sin75^(@)

SRISIRI PUBLICATION-IPE SCANNER (TEXUAL BITS)-Very Short Questions (2 marks) (Trigonometric Ratios, Transformations)
  1. Find the value of sin 34^(@) +cos 64^(@)- cos 4^(@)

    Text Solution

    |

  2. Prove that sin50^(@)-sin70^(@)+sin10^(@)=0

    Text Solution

    |

  3. Prove that 4(cos66^(@)+sin84^(@)) = sqrt(3) + sqrt(15).

    Text Solution

    |

  4. Prove that cos 20^(@) cos 40^(@) - sin5^(@) sin 25^(@) = (sqrt(3)+1)/(...

    Text Solution

    |

  5. Prove that cos theta + cos[(2pi)/3 + theta] + cos [(4pi)/(3) + theta] ...

    Text Solution

    |

  6. Prove that cos A + cos((4pi)/3 -A) + cos ((4pi)/3 + A) = 0.

    Text Solution

    |

  7. Find the value of sin 22(1/2)^(@)

    Text Solution

    |

  8. Find the value of sin 75^(@)

    Text Solution

    |

  9. Find the value of tan 75^(@)

    Text Solution

    |

  10. Find the value of tan 75^(@) + cot 75^(@)

    Text Solution

    |

  11. Find the values of cos 22(1/2)^(@) using the value of cos 45°?

    Text Solution

    |

  12. Find the values of tan 22(1/2)^(@)

    Text Solution

    |

  13. Find the values of sin 36^(@)

    Text Solution

    |

  14. Find the value of cos 18^(@)

    Text Solution

    |

  15. If cos A = sqrt((sqrt(2)+1)/(2sqrt(2))), find the value of cos2A

    Text Solution

    |

  16. IF sintheta=4/5 and theta is not in the first quadrant, find the value...

    Text Solution

    |

  17. If cos theta = t(0lt t lt 1) and theta does not lies in the first qua...

    Text Solution

    |

  18. If cos theta = t(0lt t lt 1) and theta does not lies in the first qua...

    Text Solution

    |

  19. If sin A=(12)/(13), cos B= (3)/(5) and neither A nor B is in the first...

    Text Solution

    |

  20. If 0 lt A, B lt 90^(@), cos A= (5)/(13) and sin B =(4)/(5) then find s...

    Text Solution

    |