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cos 38° cos 52° —sin 38° आए 529& |
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Answer» We know,cosA cosB - sinA sinB = cos(A+B) Here we have A = 38° and B = 52° cos(38°)cos(52°) - sin(38°)sin(52°)= cos(38°+52°)= cos(90°)= 0 |
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