Question

prove that a cos theta =b cos (c + theta) + c cos ( b + theta )​

Answer 1

Answer:

helo guys its your answer

Step-by-step explanation:

(1)

In a triangle ABC, prove that for any angle θ, b cos(A−θ)+acos(B+θ)=ccosθ. · Answer · bcos( A−θ)+acos(B+θ) =b(cosA. cosθ+sinA. sinθ)+a (2)

In a triangle abc prove that for any angle theta b cos(A-theta) + a cos(B - theta) = c costheta