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8. Introduction to Trigonometry and Its Applications
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Q8 of 120 Page 95

Find the angle of elevation of the sun when the shadow of a pole h m high is h m long.

Given: Height of the pole = h

Length of the shadow = √3 h


Let angle of elevation of the sun = θ



In



Hence, angle of elevation is 30°.


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tan θ +tan (900- θ) = sec θ sec (900- θ)

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tan θ +tan (900- θ) = sec θ sec (900- θ)

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Find the angle of elevation of the sun when the shadow of a pole h m high is h m long.

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If tan θ =1, then find the value of sin2 θ -cos2 θ.

Questions · 120
8. Introduction to Trigonometry and Its Applications
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