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Really need help... A 20 foot ladder touches a building 16 feet up the wall. What is the measure of the angle the Ladder makes with the Ground? Which expression has a value of 1? A. sinx+cosx B. sin2x-cos2x
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Really need help...

A 20 foot ladder touches a building 16 feet up the wall. What is the measure of the angle the Ladder makes with the Ground?

Which expression has a value of 1?
A. sinx+cosx
B. sin2x-cos2x
C. sin2x+cos2c
D. (sinx+cosx)2

User Hitesh Chauhan
by
5.7k points

1 Answer

3 votes
sinθ = 16/20 = 0.8
θ = arcsin(0.8) ≅ 53°
:::::
Use ^2 to represent ².
Pythagorean identity:
sin²(x) + cos²(x) = 1
User Rezwits
by
5.1k points
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