KyrosStMarie KyrosStMarie

01-02-2017
Mathematics

Answered

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?

Asinx+cosx
Bsin2x-cos2x
Csin2x+cos2c
D(sinx+cosx)2

Verified Answer :

Anonymous Anonymous

01-02-2017

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

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