Question

1 + cos square A divided by sin square A is equal to 2 cosec A - 1​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

(1+sin²A)/(sin²A)=2cosec²A-1

L.H.S.

=1+(1-sin²A)/sin²A {Since cos²A=1-sin²A}

=(2-sin²A)/(sin²A)

=(2/sin²A)-(sin²A/sin ²A) {Biparting}

=2cosec²A-1= RHS {Hence Proved}