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This is a trigonometrical ratio of complementary angle please do this sum fast pleaseplease please​

Answer»

Answer:

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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