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Find the value of cos 200^(@)sin 160^(@)...

Find the value of `cos 200^(@)sin 160^(@) + sin (-340^@) cos (-380^@)`.

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CHHAYA PUBLICATION-TRIGONOMETRIC RATIOS OF ASSOCIATED ANGLES-SAMPLE QUESTIONS FOR COMPETITIVE EXAMS - ASSERTION-REASON TYPE
  1. Find the value of cos 200^(@)sin 160^(@) + sin (-340^@) cos (-380^@).

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  2. Find the value of tan75^@

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  3. Find the value of sin105^@

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