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RRB Technician Grade 1 Model Paper 3

Question : 58 of 100

Marks: +1, -0

The value of cos0° cos30°cos45°cos60°cos90° is:

Solution:

Concept:

If any factor in a product is zero, the whole product becomes zero.

Explanation:

The given expression is

\cos 0^\circ \cos 30^\circ \cos 45^\circ \cos 60^\circ \cos 90^\circ

We know that

\cos 90^\circ = 0

Since

0

appears as one of the factors, the entire product equals

0

Thus, there is no need to calculate the other cosine values.

Answer:

0

Correct option: C

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