11. If a and B are complementary an...
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11. If a and B are complementary angles then sin? (90°- a)+sin? (90°-B) (a) o (b) 1 (c)-1 (d) 2

JEE/Engineering Exams
Maths
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( alpha+beta=90 ) ( sin ^{2}left(90^{circ}-alpharight)+sin ^{2}left(90^{circ}-3right) ) ( =cos ^{2} alpha+cos ^{2} beta ) ( =frac{cos ^{2} alpha+sin ^{2} alpha}{1}=0 )
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