Can someone explain me the reason for the underlined step.
Can someone explain me the reason for the underlined step. 60
Example 18 Prove that
2
SOL LHS= cos¯l (x) + cos¯
2
2
Let cos¯ x = x cos CL
Then, LHS = + cos¯l • cos— + —
All India 2014C
1 — COS CL
= + COS
= + COS
cos— cosa + sin —sin
3
—a
cos
3
2
cos(A — B) = COSA COSB + sin A sin .
= RHS
3
3
Problems Based on Finding
the Value of x
In this type of problem, an equation formed
