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0
46
1
avatar+101 

https://prnt.sc/itya5t

 

http://prntscr.com/itya7k

 

https://prnt.sc/ityanf

 

https://prnt.sc/ityeix part 1

 

https://prnt.sc/ityeox part 2 

 

https://prnt.sc/ityfex part 1

 

https://prnt.sc/ityfgl part 2

 

https://prnt.sc/ityg2a part 1

 

https://prnt.sc/ityg45 part 2

 

https://prnt.sc/itygip

 

https://prnt.sc/itygmv

 

https://prnt.sc/ityh19

 

(Copy and Paste the links)

Severoth  Mar 20, 2018
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1+0 Answers

 #1
avatar+85858 
+2

First one

We can use the sine, here

sin (67.4)  = 12 / r        rearrange as

r  =  12  / sin (67.4)  =     13

 

Second one

cosB  =  16/ 20   =  4/5

sinB  = √ [ 1 - cos^2B]  =√ [ 1 - (4/5)^2]  = √[9/25]  =  3/5

 

Third one :

tan A  =  a/b

 

 

cool cool cool

CPhill  Mar 20, 2018

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