A building with a height of 14 m casts a shadow that is 16 m long while a taller building casts a 24 m long shadow. What is the
2 answers:
You might be interested in
Answer:
see explanation
Step-by-step explanation:
Using the double angle identity for sine
sin2x = 2sinxcosx
Consider left side
cos20°cos40°cos80°
= (2sin20°cos20°)cos40°cos80°
= (2sin40°cos40°)cos80°
= (sin80°cos80° )
= (2sin80°cos80° )
= . sin160°
= . sin(180 - 20)°
= . sin20°
= = right side , thus proven
Step-by-step explanation:
I believe it's 16 1/2. I just used MathPapa lol.
