Question

sin(30°+@) + cos (60°+@)= cos@​

Answer 1

Step-by-step explanation:

this answer is helpful to you

Answer 2

Step-by-step explanation:

using identity sin(A+B) =sinA cosB + cosA sinB .

cos(A+B) = cosA cosB - sinA sinB .

so, sin(30°+@) + cos(60°+@)

= sin30 x sin@ + cos 30 x cos@ + cos60 x cos@ - sin60 x sin@ = sin@/2 + √3cos@/2 + cos@/2 - √3cos@/2 = sin@/2 + cos@/2 .

I think it should be this much. as I don't know any identity to solve this further.