this is a trigonometrical ratio of complementary angle please do this sum fast pleaseplease please
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Step-by-step explanation:
cos(90°-A) sin(90°-A)/ tan(90°-A)=1-cos²A
LHS=cos(90°-A) sin(90°-A)/ tan(90°-A)
=sinAcosA /CotA
=sinAcosA /cosA/sinA
=sinA / (1/sinA)
=sin²A
=(sin²A+cos²A)-cos²A
=1-cos²A= RHS
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