One of your friends says the sin of 30 degrees is negative and even sent the image below. Another friend thinks they are being negative and the sin of that angle should be positive. Who is right and what did the wrong person Calculator X Scientific History Memory M sin,( 30) -0.98803162409286178998774890729446 There's no history yet RAD F-E M+ M- MS Trigonometry f Function 2 CE exp mod n! 8 X - W a 10 10 N U + log In 0