Question

the value of cos7x+cos5x/sin7x+sin5x will be​

Answer 1

Answer:

Step-by-step explanation:

Cos7x+cos5x / sin7x+sin5x

Cos12x / sin12x

=tan12x

Hope it works

Answer 2

Convert cos7x = Cos(4x+3x) and cos5x=cos(3x+2x) and same as sin7x and sin5x.

and then..apply formula...

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

Sin(a+b)= Sin a cos b + cos a sin b.

Hope this helps..!!