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Question
cos 1°. cos 2°. cos 3° ...... cos 179° = ______.
Options
0
1
`-1/2`
– 1
MCQ
Fill in the Blanks
Solution
cos 1°. cos 2°. cos 3° ...... cos 179° = 0.
Explanation:
cos 1°. cos 2°. cos 3° .... cos 90° cos 91° .... cos 179°
= 0 ...[∵ cos 90° = 0]
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Trigonometric Functions of Allied Angels
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