Question

Solve for angleT△𝑅𝑆𝑇, given 𝑟=1.2𝑘𝑚, 𝑠=2.4𝑘𝑚, 𝑡=2.2𝑘𝑚

Answer 1

Ans:-

According to the question we solve for angle $\angle t$

So, $cos\angle t$ $=$ $\dfrac{r^2+ s^2 -T^2}{2sr}$

$\Rightarrow \dfrac{1.2^2+2.4^2-2.2^2}{2\times2.4\times1.2}$

$\Rightarrow$ $cos\angle t =$ 0.41

$\Rightarrow$ $\angle t$ $=$ 1.148