exam on monday need help (trignomentary problem)

Nov 2012
96
0
hyderabad
4 ÷ sin(90º + φ) = 10 ÷ sin(150º – φ) equation 1
tanφ = 4 ÷ √3 equation 2
can anyone tell me how equation 1 is solved to get equation 2
 
Aug 2012
102
18
Malta
Start with the identity sin(A+B) = sinAcosB+cosAsinB. See if that helps you to make progress.
 
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