Home
Class 12
MATHS
Evaluate cos^(2)45^(@)+cos^(2)135^(@)+co...

Evaluate `cos^(2)45^(@)+cos^(2)135^(@)+cos^(2)225^(@)+cos^(2)315^(@)`.

Text Solution

Verified by Experts

The correct Answer is:
2
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^(2)25^(@)+cos^(2)35^(@)-cos25^(@) cos35^(@)=

cos^(2) 5^(@) + cos^(2) 10^(@) +cos^(2) 15^(@)+...+cos^(2)360^(@)=

cos^(2) 45^(@) - sin^(2) 15^(@)=

cos^(2) 9^(@)+cos^(2)18^(@)+cos^(2) 27^(@)+...+cos^(2)81^(@)=

cos^(2) 36^(@) + cos^(2) 72^(@)=

cos^(2)5^(@)+cos^(2)10^(@)+cos^(2)15^(@)+.....+cos^(2) 90^(@)=

cos^(2)1^(@)+ cos^(2)2^(@)+cos^(2)3^(@)+....+cos^(2)90^(@)=

Cos^(2)20^(@)+Cos^(2)40^(@)+cos^(2)80^(@)=

( cos^(2) 33^(@) - cos^(2) 57^@)/( sin 21^(@) - cos 21^(@))=

Find the value of cos^(2)45^(@)-sin^(2)15^(@)

SRISIRI PUBLICATION-IPE SCANNER (TEXUAL BITS)-Very Short Questions (2 marks) (Trigonometric Ratios, Transformations)
  1. Find the value of sin^(2)""(pi)/(10)+sin^(2)""(4pi)/(10)+sin^(2)""(6pi...

    Text Solution

    |

  2. Show that cos^(2)""(pi)/(10)+cos^(2)""(4pi)/(10)+cos^(2)""(6pi)/10+cos...

    Text Solution

    |

  3. Evaluate cos^(2)45^(@)+cos^(2)135^(@)+cos^(2)225^(@)+cos^(2)315^(@).

    Text Solution

    |

  4. If tan20^(@) = lambda then show that (tan 160^(@) -tan 110^(@))/(1+tan...

    Text Solution

    |

  5. If tan20^(@)=p then prove that = (tan610^(@)+tan700^(@))/(tan 560^(@)-...

    Text Solution

    |

  6. If "sec" theta + tan theta = 2//3, then find the value of sin theta an...

    Text Solution

    |

  7. If "sec" theta + tan theta = 5 then find sin theta and determine the q...

    Text Solution

    |

  8. If cosec theta + cot theta =1//3, then find cos theta and determine th...

    Text Solution

    |

  9. If acos theta -bsin theta =c, then show that asine theta + bcos =pm s...

    Text Solution

    |

  10. If 3sin A + 5 cos A = 5, then show that 5 sin A - 3 cos A = +- 3.

    Text Solution

    |

  11. If 3sin A + 4 cos A = 5, then find the value of 4 sin theta - 3 cos th...

    Text Solution

    |

  12. Show that sin 1140^(@) cos 390^(@)-cos 780^(@) sin 750^(@) = 1//2.

    Text Solution

    |

  13. Find the value of sin 330^(@) .cos 120^(@) + cos 210^(@) . Sin 300^(@)...

    Text Solution

    |

  14. Simplify cos 100^(@) cos 40^(@) + sin 100^(@) sin 40^(@).

    Text Solution

    |

  15. Show that sin 750 ^(@) cos 480^(@) + cos 120 ^(@) cos 60 ^(@)=-1/2

    Text Solution

    |

  16. Prove that sin 780^(@) sin 480^(@)+cos240^(@). Cos300^(@) = 1/2

    Text Solution

    |

  17. Find the value of tan56^(@)-tan11^(@)-tan56^(@).tan11^(@).

    Text Solution

    |

  18. Prove that tan70^(@)-tan20^(@)=2tan50^(@).

    Text Solution

    |

  19. Prove that tan72^(@)=tan18^(@)+2tan54^(@).

    Text Solution

    |

  20. Show that cos 35^(@) + cos 85^(@) + cos 155^(@) = 0

    Text Solution

    |