Question

1 minus tan A divided by 1 + tanA is equal to COT a - 1 / cot A + 1

Answer 1

Step-by-step explanation:

1-tanA/1+tanA=cotA-1/cotA+1

we know tanA=1/cotA......(1)

substituting the value in place of tanA.

1-1/cotA the whole divided by 1+1/cotA .

taking lcm.

we get,

cotA-1/cotA÷cotA +1/cotA will be equal to...

cotA-1/ cotA ×cotA /cotA+1{division of division ...is multiplication.}

now cancelling the cotA ..we get cotA-1/cotA +1

Hope it helps you....