Question 25

∆DEF is right angled at E. If $$cosec D = \frac{25}{24}$$, then what is the value of $$cos F$$ ?

Solution

Given : $$\cosec D$$ = $$\frac{25}{24}$$

Also, $$\cosec D=\frac{DF}{EF}=\frac{25}{24}$$

Let DF = 25 cm and EF = 24 cm

To find : $$\cos F=\frac{EF}{DF}$$

= $$\frac{24}{25}$$

=> Ans - (C)

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