Question

cos90°.cosec180°=1. ​

Answer 1

Answer:

Step-by-step explanation:

value of equation above is 0. because in this cos 90 is also being multiplied. since value of cos 90 is 0 so whole equation becomes 0.

=cos1.cos2.....cos90...cos 180

= cos 1. cos 2.... (0)...cos 180

= 0 answer

thanks