Question

please help me please please please please please please​

Answer 1

Answer:

ok so for question no. 19 the answer is cos 1

because any number to the power 0 is 1

so after taking cos 1 common we get

cos 1 (1×1×1×1.........×1)

= cos 1

n for question no. 20 the angle between radius and tangent is 90 degree

the proof, you will find it in your textbook

hope this helps, bye!

Answer 2

19; cos 1°

20 : 90°

because to all equal.