Recent content by kbr1804

  1. K

    MHB Proving trigonometric functions

    yeah i think i got it lol thanks a lot:)and yeah it was supposed to equal to 3cos2x that was a typo
  2. K

    MHB Proving trigonometric functions

    How can i prove that 6cos(x+45) cos(x-45) is equal to 3cosx?
    • kbr1804
    • Thread
    • Functions Trigonometric Trigonometric functions
    • Replies: 9
    • Forum: General Math