Question

The value of cos 0° cos 1° cos 2º cos 3º ... cos 89° is
(a) 1
(b) -1
(c) 0
(d)1/v2​

Answer 1

Answer:

The correct answer is option (c) 0

Step-by-step explanation:

Making complementary angles we will get

cos(1+89).........cos(90+0)

since cos90 = 0

hence whole multiplied by 0=0