General
Easy
Maths-

vertical line a with not stretchy bar on top vertical line equals vertical line b with not stretchy bar on top vertical line equals vertical line c with not stretchy bar on top vertical line equals vertical line a with not stretchy bar on top plus b with not stretchy bar on top plus c with not stretchy bar on top vertical line equals 1  and a with not stretchy bar on top perpendicular b with not stretchy bar on top left parenthesis c with not stretchy bar on top comma a with not stretchy bar on top right parenthesis equals alpha comma left parenthesis c with not stretchy bar on top comma b with not stretchy bar on top right parenthesis equals beta comma t h e n space cos alpha plus cos space beta equals

Maths-General

  1. 3 divided by 2
  2. 1
  3. -1
  4. 2

    Answer:The correct answer is: -1

    Book A Free Demo

    +91

    Grade*

    Related Questions to study