Question

find approximate value of, cos(89° , 30') ; given 1°=0.0175 radian​

Answer 1

Answer:

Step-by-step explanation:

Cos(89°30')=cos(90-1/2)°

=Cos90cos(1/2)+sin90sin(1/2)

=Sin(1/2)

1°=0.0175rad 1/2°=0.0175/2 rad=0.00875rad

For very small angle A , sinA can be approximated as sinA=A

So, sin(1/2)°=0.00875