R
Method II
from the figure,
25k
P
PR
sec 0 =
PQ
.. PQ = 7k, PR = 25k
According to Pythagoras therom,
PQ² + QR2 = PR
.. (7k)? + QR2 = (25k)?
QR2 = 625k – 49k² = 576k
7k
Fig. 6.5
.. QR = 24k
OR
Now, tan 0 =
PO
24k_24
7K 7
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