Question

secA( 1-sinA)( secA+tanA )= 1​

Answer 1

Answer:

sec (1- sin)(sec+tan)

(sec-sec.sin)(sec+tan)

(sec-tan)(sec+tan)

=>sec²-tan². {(a+b)(a-b)= a²- b² }

=>1 { sec²-tan²=1}

Step-by-step explanation:

hence proved