[ 2nd ] [ HYP ] [ cos ] 1.5
[ 
] [ + ] 2 [ 
]
13 sinh –1 7 = 2.644120761
[ 2nd ] [ HYP ] [ 2nd ] [ sin –1 ]
7 [ 
]
Example 30
If x = 5 and y = 30, what are r and 
? Ans : r = 30.41381265, 
= 80.53767779 o
[ 2nd ] [ R
P ]
[ 
] 5 [ ALPHA ] [ 
] 30
[ 
]
[ 2nd ] [ R
P ] [ 
]
[ 
] 5 [ ALPHA ] [ 
] 30
[ 
]
14 If r = 25 and 
= 56 o what are x and y? Ans : x = 13.97982259, y = 20.72593931
