3.Trigonometrical Ratios, Functions and Identities
easy

જો $75$ સેમી લંબાઈવાળા લોલકનું અંત્યબિંદુ $10$ સેમીનાં ચાપ બનાવે, તો તેણે કેન્દ્ર આગળ બનાવેલ ખૂણાનાં રેડિયન માપ શોધો.

A

$\frac{2}{15}$

B

$\frac{2}{15}$

C

$\frac{2}{15}$

D

$\frac{2}{15}$

Solution

We know that in a circle of radius $r$ unit, if an arc of length $l$ unit subtends

An angle $\theta$ radian at the centre, then $\theta=\frac{l}{r}$

It is given that $r=75 \,cm$

Here, $l=10\, cm$

$\theta=\frac{10}{75}\, radian =\frac{2}{15}\, radian$

Standard 11
Mathematics

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