Cos^2 (80 °+theta) +sin^2(100°-theta)
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Answer:
1
Explanation:
cos^2(80+ theta) + sin^2(100 - theta)
= cos^2(80+theta ) + sin^2[180-(80+ theta) ]
= cos^2(80+theta) + sin^2(80+theta) ... [sin(180-theta) =theta]
= cos^2(80+theta) + sin^2(80+ theta)
= 1
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