Evaluate the following and justify your answer.
` sec 16^(@) cosec 74^(@) -cot 74^(@) tan 16^(@) `

Evaluate the following and justify your answer. sin 5^(@) cos 85^(@) +cos 5^(@) sin 85^(@)

Evaluate the following and justify your answer. (i) (sin ^(2) 15^(@) +sin ^(2) 75^(@) )/( cos ^(2) 36^(@) +cos ^(2) 54^(@))

Say true or false and justify your answer: 2^3>5^2

Evaluate the following (sin 30^(@) +tan 45^(@) -cosec 60^(@) )/( sec 30^(@)+cos 60^(@) + cot 45^(@))

Evaluate the following tan^(-1) { cot (- 1/4)}

Evaluate the following (cos 45^(@))/( sec 30^(@) +cosec 60^(@))

Evaluate the following : sec( cot^(-1). 16/63)

Evaluate the following : tan ( cosec^(-1) sqrt(41)/4)

Find the values of cosec 60 ^(@) ,sec 60^(@) and cot 60^(@)