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Question

1sin10o3cos10o=4

A
True
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B
False
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Solution

The correct option is B False
1sin103cos10
=2(12sin1032cos10)
We know that sin30=12 and cos30=32
=2(12sin1032cos10)
=2(sin30sin10cos30cos10)
=2(cos30cos10sin30sin10)
=2(cos(30+10))
=2cos404
Hence the statement is false.

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