Question

the shadow of a Tower is 30 M long when the sun's elevation is 30 degree what is the length of the shadow and the sun's elevation is 60 degree

Answer 1

30 m is opposite to 30 degree, according to trigo.. sides opposite 30, 60,90 degree are in the ratio 1:root 3:2 . Height of building is opposite to 60 so it will be 30 root3. In the next case height is opposite to 30 so shadow is opposite to 60 and so its length will be 30×3=90m