Home
Class 11
MATHS
If acosphi=b costheta,show that a tanthe...

If `acosphi=b costheta`,show that `a tantheta+b tanphi=(a+b)tan((theta+phi)/2)`

Promotional Banner

Topper's Solved these Questions

  • MODEL QUESTION PAPERS-SET 8

    UNITED BOOK HOUSE|Exercise EXERCISE|50 Videos

  • Model Test Set - 1

    UNITED BOOK HOUSE|Exercise Exercise|43 Videos

Similar Questions

Explore conceptually related problems

If " "a cos phi = b cos theta," show that " a tan theta + b tan phi = (a+b) tan ((theta + phi)/2)

tan 3theta = tan 2theta + tantheta

tan3theta + tantheta = 2tan 2theta

sin^(3)theta = tan2theta + tantheta

Show that sectheta+tantheta=tan(pi/4+theta/2)

If " "32 sin^(6) theta = 10 - 15 cos 2 theta + b cos 4 theta + alpha cos 6 theta,"show that, " tan theta tan 5 theta = (a+b-5)/(a-b+7).

If 2 tan theta = cot phi, "show that" cos(theta - phi) = 3 cos ( theta + phi).

If sin theta = k sin (theta + phi),"show that", tan(theta + phi) = (sin phi)/(cos phi -k).

If costheta_1 =2costheta_2, then tan((theta_1-theta_2)/2)tan((theta_1+theta_2)/2) is equal to

"If" (a cos theta sec phi - x)/(a sin (theta + phi)) = (y - b sin theta sec phi)/(b cos (theta + phi)) = tan phi, "show that," x^(2)/a^(2) + y^(2)/b^(2) = 1.

UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 9-EXERCISE
  1. Show that the mean deviation with respect to Arithmetic mean is zero

    Text Solution

    |

  2. If f(x)=1/x^2,show that f(x)-f(x+1)=(2x+1)/(x^2(x+1)^2)and hence again...

    Text Solution

    |

  3. If acosphi=b costheta,show that a tantheta+b tanphi=(a+b)tan((theta+ph...

    Text Solution

    |

  4. Show that tan20^@tan40^@tan80^@=sqrt3

    Text Solution

    |

  5. Prove the following by the method of mathematical induction. :n^3+(n+1...

    Text Solution

    |

  6. If the sum of 1+2r+3r^2+4r^3+...oo9/16,find the value of r.

    Text Solution

    |

  7. In how many ways can the crew of an 8-oared boat be arranged if 2 of t...

    Text Solution

    |

  8. Express(sqrt3-i)/(1-sqrt3i)in modulus amplitude form

    Text Solution

    |

  9. In /\XYZthe equation of the perpendicularbisector of XY and XZ arc x-y...

    Text Solution

    |

  10. Find the co-ordinate of the image of the point (-3, -1), with respect ...

    Text Solution

    |

  11. Show that the circle with the portion of the line 3x + 4y = 12 interce...

    Text Solution

    |

  12. Find the equation to the locus of a point whose distance from YZ plane...

    Text Solution

    |

  13. Evaluate the following limits :lim(xrarr0)(xtan2x-2xtanx)/((1-cos2x)^2...

    Text Solution

    |

  14. If f(x)=|x-1|1+x^2.Is f'(x) exist?examine it.

    Text Solution

    |

  15. Using contrapositive method show tha the compund statement .is true or...

    Text Solution

    |

  16. Show that sqrt3is irrational. (Use the method of contradiction).

    Text Solution

    |

  17. If the letters of the word PROBABILITY be arranged at random, find the...

    Text Solution

    |

  18. AM and SD of 7- observations are 8 and 4. If 5.of the 7 observations a...

    Text Solution

    |

  19. Find the maximum and minimum value of 5costheta+12sintheta+12

    Text Solution

    |

  20. Show that the equations,sin^2theta=sin^2alpha,cos^2theta=cos^2alphaand...

    Text Solution

    |