Evaluate : `(i ^53+1/i^53)`

Evaluate: -1855 div (-53)

Evaluate: (2tan 53^(@))/(cot 37^(@))-(cot 80^(@))/(tan 10^(@))

Evaluate: (2tan 53^(@))/(cot 37^(@))-(cot 80^(@))/(tan 10^(@))

Evaluate the following : (i) (sin58^(@))/(cos32^(@)) (ii) (sec42^(@))/("cosec"48^(@)) (iii) (tan37^(@))/(cot53^(@))

Calculate the amount of .53^( I^(128))(t_(1//2)=25 min) left after 75 minutes.

Express each of the following fractions as a percent: (i) 3/4 (ii) (53)/(100)

Find the value of pi /53.2 with due regard to significant figures.

Find the value of x if |[2, 1 ,x+1],[-1,3,-4],[0,-5,3]|=0

Convert the followng into products: (i) sin 53 ^(@) + sin 21 ^(@), (ii) cos 83^(@) - cos 17^(@), (iii) sin 50^(@)- cos 80^(@)

The V-I graphs of parallel and series combinations of two metallic resistors are shown in (Fig. 3.53). Which graph represents the parallel combinations ? .