+0  
 
+1
116
3
avatar+154 

 

 

 

2.3

 Apr 2, 2020
 #1
avatar+154 
+2

Thanks Again for the help!!

 Apr 2, 2020
 #2
avatar+112413 
+1

First one

 

Area  =  (1/2) (WX) (WY)  sin W  =  (1/2) (10.3)(12.8) sin ( 63°)  ≈  58.7 in ^2 

 

 

Second one

 

arc length  =   r *  central angle  in radians

 

(7/15)pi  = 14  *  central angle        divide  both  sides  by 14

 

(1/14) (7 / 15) pi  =   central angle  =  (7 / 210) pi   =  (1/30)pi

 

 

Last  one

 

sin θ  =  -  sqrt  [ 1  -  cos^2 theta ] =  - sqrt  [ 1 -  2/9 ]  =  - sqrt [ 7] / 3

 

sin B  =  4/5     cos B  = 3/5

 

 

sin ( θ  + B)    = sinθ cos B  + sin B cos θ   =   [ - sqrt (7)/3 ] [ 3/5]  +  [ 4/5] [ -sqrt (2) / 3   ]  =

 

[ -3sqrt (7)  - 4sqrt (2)  ] /  15

 

 

 

cool cool cool

 Apr 2, 2020
 #3
avatar+154 
+1

Thanks Can you help on my other qustions Plzz

https://web2.0calc.com/questions/help-plzz_9#r2

whatisthis1010  Apr 2, 2020

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