If the sin B = 0.7660, find m ∠B to the nearest degree.

Question

anonymous · Answer

u can calculate it by calculator.

anonymous · Answer

just type in sin-1 (0.7660) and you will get 49.996 degrees - 50.0 degrees.

anonymous · Answer

???
i think if you type sin-1
u should get  49.996 degrees and  (180degree- 49.996 degrees)

anonymous · Answer

because sinA=sin(pi-A)
cosA=cos(-A)

anonymous · Answer

ack, actually it was meant to be sin^-1 (in calculator, type SHIFT + SIN)

anonymous · Answer

sin^-1 means arcsin

anonymous · Answer

but it's not in a circle right?

anonymous · Answer

can u explain what does  ''49.996 degrees - 50.0 degrees''means ?
between  49.996 degrees  and   50.0 degrees. 
or one is 49.996 degreesv and another is -50.0 degrees.

anonymous · Answer

oh, sorry about that, actually it's 49.996 degrees and so I changed it into 2 significant figures which is 50.0 degrees. Sorry about the confusion...

anonymous · Answer

...ok, i know it. we all get the corrected answer.
but i think the perfect ans is 49.996 degrees and (180-49.996) degrees.

anonymous · Answer

yeah, I do agree too! I normally take up to 4 decimal places to get the most accurate answer.