[" 26.Calculate the angle of "],[" (a) "1^(0)" (degree) "],[" (b) "1'" (minute of arc or arc min) "]

Calculate the angle of (a) 1^(@) (degree) (b) 1' (minute of arc or arc minute)

Calculate angle of 1 second of arc.

Calculate each exterior angle of a regular octagon.

Calculate the angle of (i) 1^(@)" (degree)" in radius. "Use "360^(@)=2pi" rad, "1^(@)=60^(@) and 1'=60''

Calculate the critical angle when the refractive index is 2.

Calculate the angle of refraction and refractive index of water if reflected light is plane polarised when incident at an angle of 55^@ .