Question

if y = sec(x°+30°) then dy/dx =

Answer 1

y = 1/cos(x°+30°)

X° can be converted to radians 
 
X°= pi times x÷180 
Therefore the derivative is 
dy/dx=cos(pi times x ÷180).pi/180

dy/dx= [-1/cos^2 (x°+30°) ](- sin(x°+30°) ) (¶/180)

dy/dx = ¶/180sin(x°+30°)/cos(x°+30°)*cos(x°+30°)


dy/dx = ¶/180 sec(x°+30°).tan(x°+30°)