Ask a New Question
Menu

prove sin(α+β)sin(α-β)=cos^2β-cos^2α

1 answer

sin(a+b)sin(a-b)
(aina cosb + cosa sinb)(sinacosb - cosa sinb)
sin^2acos^2b + sinacosasinbcosb - sinacosasinbcosb - cos^2asin^2b)
(1-cos^2a)cos^2b - (1-cos^2b)cos^2a
cos^2b - cos^acos^b - cos^2a + cos^2acos^2b
cos^2b - cos^2a
Similar Questions
  1. HII WOULD LIKE TO KNOW WHAT I CAN POSSIBLY PROVE ABOUT EITHER THE BERMUDA TRIANGLE OR ATLANTIS THE LOST EMPIRE WE AARE SUPPOSED
    1. answers icon 4 answers
    1. answers icon 0 answers
  3. uestion 1Video Player A) What theorem can be used to prove that the triangles are congruent? (1 point) Responses SSS SSS ASA ASA
    1. answers icon 1 answer
  4. 7. Prove that tan B� sin B� + cos �B = sec B�.11. Prove that tanλ cos^2λ +sin^2λ/sinλ = cos λ� + sin λ�. 12. Prove that
    1. answers icon 1 answer
more similar questions