A=5 sec(A)/1-4sinA.sinA +cosecA/4cosA.cosA-1 find value

Answer 1

you seriously need some parentheses in there to make it clear what you want. As it stands, since multiplication is done before addition, you have

secA/1 - (4sinA)(sinA) + (cscA)/(4) * (cosA)(cosA) - 1

I seriously doubt that is what you wanted. Type it into the box at wolframalpha.com and keep inserting parentheses until it interprets correctly.

while you're at it, you can make A=5 and get your answer. Come on back if you can't figure out how woframalpha did it.