JEE Math Practice Question
The value of $$\cos {\pi \over {{2^2}}}.\cos {\pi \over {{2^3}}}\,.....\cos {\pi \over {{2^{10}}}}.\sin {\pi \over {{2^{10}}}}$$ is -
- A.$${1 \over {256}}$$
- B.$${1 \over {2}}$$
- C.$${1 \over {1024}}$$
- D.$${1 \over {512}}$$
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