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
Mathematics
KyrosStMarie
Question
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. sin2xcos2x
C. sin2x+cos2c
D. (sinx+cosx)2
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. sin2xcos2x
C. sin2x+cos2c
D. (sinx+cosx)2
1 Answer

1. User Answers Anonym
sinθ = 16/20 = 0.8
θ = arcsin(0.8) ≅ 53°
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Use ^2 to represent ².
Pythagorean identity:
sin²(x) + cos²(x) = 1