Question

cos45.cos46.cos47....cos135

Answer 1

cos45* cos46* cos47* ...............*cos90 ......*cos135 = 0.since cos90 =0


this is your answer

Answer 2

Answer:

The correct answer is 0.

Step-by-step explanation:

Here, the given expression is,

$cos 45.cos 46.cos 47................cos 135$

$=cos 45\times cos 46\times cos 47.....\times cos 90..........\times cos 135$

Since, we know that,

cos 90° = 0,

$=cos 45\times cos 46\times cos 47.....\times 0..........\times cos 135$

Also, a number after multiplication with 0 always gives 0,

Hence,

$=cos 45\times cos 46\times cos 47.....\times 0..........\times cos 135=0$

$\implies cos 45.cos 46.cos 47................cos 135=0$