Home
Class 11
MATHS
If (cosx)/a=(cos(x+theta))/b=(cos(x+20))...

If `(cosx)/a=(cos(x+theta))/b=(cos(x+20))/c=(cos(x+3theta))/d` then `(a+c)/(b+d)` is equal to (a)`a/d` (b) `c/b` (c) `b/c` (d) `d/a`

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • STRAIGHT LINES

    CENGAGE ENGLISH|Exercise All Questions|491 Videos

Similar Questions

Explore conceptually related problems

If cosx/a=cos(x+theta)/b=cos(x+2theta)/c=cos(x+3theta)/d then (a+c)/(b+d) is equal to (A)a/d (B)c/d (C)b/c (D)d/a

If cos 5theta=a cos theta+ b cos^(3) theta+c cos^(5)theta+d , then

If tantheta=a/b ,then bcos2theta+asin2theta is equal to (a) a (b) b (c) a/b (d) b/a

If a sin x+b cos(x+theta)+b cos(x-theta)=d, then the minimum value of |cos theta| is equal to

lf cos 5theta-acos^5 theta + b cos^3 theta + c cos theta then c is equal to-

Let (sin(theta-alpha))/("sin"(theta-beta))=a/b a n d(cos(theta-alpha))/("cos"(theta-beta))=c/d t h e n(a c+b d)/(a d+b c)=

If (costheta+cos2theta)^3=cos^3theta+cos^3 2theta, then the least positive value of theta is equal to pi/6 (b) pi/4 (c) pi/3 (d) pi/2

The value of (cos3theta)/(2cos2theta-1) is equal to (a) costheta (b) sintheta (c) tantheta (d) none of these

The value of (cos3theta)/(2cos2theta-1) is equal to (a) costheta (b) sintheta (c) tantheta (d) none of these

Let (sin(theta-alpha))/("sin"(theta-beta))=a/b a n d(cos(theta-alpha))/("cos"(theta-beta))=c /d t h e n(a c+b d)/(a d+b c)= (a) cos(alpha-beta) (b) sin(alpha-beta) sin(alpha+beta) (d) none of these

CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. If a , ba n dc are the side of a triangle, then the minimum value of (...

    Text Solution

    |

  2. sinx+cosx=y^2-y+a has no value of x for any value of y if a belongs to...

    Text Solution

    |

  3. If (cosx)/a=(cos(x+theta))/b=(cos(x+20))/c=(cos(x+3theta))/d then (a+...

    Text Solution

    |

  4. Let P Q R be a triangle of area with a=2,b=7/2,and c=5/2, where a, b ...

    Text Solution

    |

  5. If the inequality sin^2x+acosx+a^2>1+cosx holds for any x in R , then...

    Text Solution

    |

  6. If cosalpha+cosbeta=0=sinalpha+sinbeta, then cos2alpha+cos2beta is e...

    Text Solution

    |

  7. If the angle A ,Ba n dC of a triangle are in an arithmetic propression...

    Text Solution

    |

  8. The equation sin^4x-2cos^2x+a^2=0 can be solved if (a) -sqrt(3)lt=alt=...

    Text Solution

    |

  9. Value of (3+cot80^0cot20^0)/(cot80^0+cot20^0) is equal to (a)cot20^0...

    Text Solution

    |

  10. Let A B C be a triangle such that /A C B=pi/6 and let a , b and c deno...

    Text Solution

    |

  11. If tanalpha is equal to the integral solution of the inequality 4x^2-...

    Text Solution

    |

  12. Consider the system of linear equations in x , ya n dz : ""(sin3theta...

    Text Solution

    |

  13. Let A B C D be a quadrilateral with area 18 , side A B parallel to the...

    Text Solution

    |

  14. The number of ordered pairs which satisfy the equation x^2+2xsin(x y)+...

    Text Solution

    |

  15. Let alpha and beta be such that pi<alpha-beta<3pi, If sinalpha+sinbeta...

    Text Solution

    |

  16. Let A0A1A2A3A4A5 be a regular hexagon inscribed in a circle of unit ra...

    Text Solution

    |

  17. If alpha=pi/(14), then the value of (tanalphatan2alpha+tan2alphatan4al...

    Text Solution

    |

  18. The equation (cosp-1)x^2+(cos p)x+sin p=0 in the variable x has real...

    Text Solution

    |

  19. In A B C , the median A D divides /B A C such that /B A D :/C A D=2:1...

    Text Solution

    |

  20. If 0lt=xlt=2pia n d|cosx|lt=sinx , then (a) then set of all values of...

    Text Solution

    |