Find the value of expression `(cospi/2+i sin(pi/2))(cos(pi/(2^2))+i sin(pi/(2^2)))......oo`

sin (pi/2) = 2 sin(pi/4) cos (pi/4)

Find the value of (cos pi+i sin pi)

The value of cos(pi/2^(2)).cos(pi/2^(3))……….cos(pi/2^(10)).sin(pi/2^(10)) is

Find the value of sin^(-1)("sin"(2pi)/(3))+cos^(-1)("cos"(4pi)/(3))

Find the value of 2cos((5 pi)/(12))cos((pi)/(12)) and 2sin((5 pi)/(12))cos((pi)/(12))

Value of expression sin^(2)(pi)/(6)+cos^(2)(pi)/(4)-sec(pi)/(3) is

What is the value of expression cos^(2)((pi)/(8))+4cos^(2)((pi)/(4))-sec((pi)/(3))+5tan^(2)((pi)/(3))+sin^(2)((pi)/(8)) ?

Minimum value of the expression (1)/(cos^(2)((pi)/(4)+x)+sin^(2)((pi)/(4)-x))