How do you solve #sin A=.8365#?

2 Answers
Apr 8, 2018

#56^@46'20.4''#

Explanation:

Type on calculator (hp 9s) :-

#0.8365#

then arc sine (2ndF sin)

display #56.77235303^@#

then 2ndF #(@,,,rarr)#

display:- #56^@ 46'20.4''#

Apr 8, 2018

#56^@7723; 303^@2276#

Explanation:

sin A = 0.8365
Calculator gives --> #A = 56^@7723#
Unit circle gives another A that has the sane cos value (0.8365) -->
#A = - 56^@7723#, or
#A = 360 - 56.7723 = 303^@2276# (co-terminal)