Question

find the value of sin(-1170)​

Answer 1

Step-by-step explanation:

sin(-360°×3+90°)=sin(-90°)=-1

Answer 2

$\large{ \bold{ \underline{Solution :- \: \: \: }}}$

$\to \bold{Sin \: ( \: - \: 1170 \: ) \: } \\ \\ \to \bold{- \: Sin \: ( \: 1170 \: ) \: } \\ \\ \to \bold{- \: Sin ( \: 360 × 3 + 90 \: ) \: } \\ \\ \to \bold{- \: Sin \: ( \: 90 \: ) \: } \\ \\ \to \bold{- \: 1 \: }$

$\large{ \bold{ \underline{Identity \: Used :- \: \: }}}$

• Sin ( -Theta) = - Sin (Theta)

• Sin (360 × n + Theta) = Sin (Theta)