two men on either side of a temple of 30 metres high observe its top at the angle of elevation alpha and beta respectively. the distance between two men is 40root 3 metres and the distance between the first person A and the temple is 30 root 3 metres find <CAB = ? . 2. <ABC = ? 3. cos inverse (4/5) = ? 4. domain and range of cos inverse x.
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Step-by-step explanation:
AB=30 m, ∠APB=30
∘
,∠AQB=60
∘
In △ABP,
tan(∠APB)=
PB
AB
tan30
∘
=
PB
30 m
PB=30
3
m
In △ABP,
tan(∠AQB)=
QB
AB
tan60
∘
=
QB
30 m
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