Question

cos1cos2cos3cos4cos5....cos111=??​

Answer 1

Answer:

zero is the answer........

Answer 2

Given Expression,

cos1.cos2.cos3.cos4..............cos111

Here,

cos90 exists in the given equation

We know that,

cos90=0

Thus,

cos1×cos2×cos3×cos4×..........×cos90×........cos111 = 0