please help me..........
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1.6666
Step-by-step explanation:
by pythagoras theorem,
(20)²= (16)²+ (opposite side)²
400= 256+ (opposite side)²
(opposite)² side =400-256
(opposite side)² = 144
Taking square root of both the sides
opposite side = 12
cosec theta = hypotenuse / opposite side
= 20/16
=1.66666
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