Question

solve please .............​

Answer 1

Answer:

The given condition gives us that

cos@1 cos@2 cos @3 ..... = sin@1sin@2 sin @3 .....

and for both of these sides to be equal along with the condition such that we should have maximum value of product of all the cosines , each angle namely

@1 = @2 = @3 = .... = 45° = π/4

So,

cos @1 * cos @2 ..... = (1/√2)^n = 1/2^n/2

So, option (A) is correct I suppose