Hi pls help me thanksss
pls provide me with workings thankss :)

Step-by-step explanation:

(i)

Using cos(a - b) = cos a cos b + sin a sin b

= cos a cos b +

cos a cos b =

(ii)

Using cos(a + b) = cos a cos b - sin a sin b

cos(a + b) =

(iii)

Using cot a =

  ×

= 3

please give me a brainliest answer

5+2x=a

asdasdsaadsaddsasds