`sec^2A -tan^2A=`

(sec^4 - tan^4A)/(sec^2 A - tan^2 A) =………

Prove that (secA+tanA)/(sec^2 A- tan^2 A)=secA+tanA

The expression cosec^(2)A cot^(2)A-sec^(2)A tan^(2)A-(cot^(2)A-tan^(2)A)(sec^(2)A cosec^(2)A-1) is equal to

cos ec^(2)A cot^(2)A-sec^(2)A tan^(2)A-(cot^(2)A-tan^(2)A)(sec^(2)A cos ec^(2)A-1)

The expression cosec^(2)A cot^(2)A-sec^(2)A tan^(2)A-(cot^(2)A-tan^(2)A)(sec^(2)A cosec^(2)A-1) is equal to

9sec^2A-9tan^2 A is equal to

If A=60^(@) , verify that : (i) sin^(2)A+cos^(2)A=1" (ii) "sec^(2)A-tan^(2)A=1

If angleA+angleB = 90^@ , show that 1+(tan A)/(tan B) = sec^2B tan^2A .

Prove: tan^(2)A sec^(2)B-sec^(2)A tan^(2)B=tan^(2)A-tan^(2)B