cos30degree .cos45degree - ssi30degree .sin 45degree
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cos30degree .cos45degree - ssi30degree .sin 45degree
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Answer:
( - 1 )/ 2
Step-by-step explanation:
= cos30° .cos45° - sin30° .sin 45°
= / 2 X 1 / - 1 /2 X 1 /
= / 2 - 1 / 2
=( - 1 )/ 2
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