Question

Without using calculator find the value of sin(-765*)

Answer 1

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Answer 2

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Value of Sin (-765*)

We know that sin (-) =-sin

So here Sin (765) = sin (8*90+45)

   Sin (765)     =sin (45)

As we know sin (45) = 1/

So here we are putting the values of sin (45)

 Thus     Sin (765)  =sin 1/

So required answer is Sin (765) = - 1/

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