Question

find cos 1x cos 2x cos 3 x ----------x cos 100? ​

Answer 1

Answer:

0

Step-by-step explanation:

cos 1x cos 2x cos 3 x ----------x cos 100

= cos 1 x cos 2 x cos 3 x ----- cos90 x cos91 x --------x cos100

Now, cos90 = 0

Therefore, the whole product comes as 0, as anything multiplied by 0 gives 0.