Trigonometric Identities Worksheet With Answers Page 3
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25SOLUTION:
13-1 Trigonometric Identities
7.
SOLUTION:
8. CCSS PERSEVERANCE When unpolarized light passes through polarized sunglass lenses, the intensity of the
light is cut in half. If the light then passes through another polarized lens with its axis at an angle of θ to the first, the
intensity of the emerging light can be found by using the formula
, where I
is the intensity of the
o
light incoming to the second polarized lens, I is the intensity of the emerging light, and θ is the angle between the axes
of polarization.
a. Simplify the formula in terms of cos θ.
b. Use the simplified formula to determine the intensity of light that passes through a second polarizing lens with axis
at 30° to the original.
SOLUTION:
a.
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