Question

pls solve this question​

Answer 1

Answer:

sin 3£=3sin£-4sin³£,cos3£=4cos³£-3cos£

(sin3£-cos3£)/sin£+cos£

(3sin£-4sin³£-4cos³£+3cos£)/(sin£+cos£)+1

{sin£(3-4sin²£)+cos£(-4cos²£+3)/(sin£+cos£)+1}

{(sin£+cos£)(3-4sin²£-4cos²£+3)/(sin£+cos£)+1}

{(3-4(sin²£+cos²£)+3)+1}it gets cancelled

{(3-4+3)+1

{(2)+(1)

=3