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If an angle and a side of a right angle ...

If an angle and a side of a right angle triangle is known , then rest of the sides and angles can be found as follows
In `DeltaABC `(figure ), if `angleB=90^(@),angleC=theta and BC=x`, then `AB=x tan theta and AC=x sec theta ` .

Now, consider in isosceles triangle PQR (Figure 2),

Where PQ=PR and `20N=sqrt(3)`
On the basis of the above information answer the question
The angle of triangle PQR are

A

`150^(@),15^(@),15^(@)`

B

`60^(@),60^(@),60^(@)`

C

`120^(@),30^(@),30^(@)`

D

`75^(@),52.5^(@),52.5^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
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