Question

prove the above trignometrical identity​

Answer 1

Step-by-step explanation:

RHS:

1/(sec @+tan @) -1/cos @

=>sec @ - tan @ - sec @

=>sec @ - (tan @+ sec @)

=>1/cos @ - 1/(sec @- tan @)

(LHS) proved....

the identity used above was:

sec @+ tan @ =1/(sec @- tan @)