angelina  Date: Sunday, 26/Jan/2014, 12:59  Message # 1 
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 i have this trig equation, 2cosx  10sinx = 0 i need to solve for x, what is the best method i can use? please show me a way......


 
zulfa  Date: Sunday, 26/Jan/2014, 13:04  Message # 2 
 use Auxiliary method Rcos(x+y) = c where R = √(a^2 + b^2)


 
badshah  Date: Sunday, 26/Jan/2014, 19:54  Message # 3 
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 use t formula for sin and cosine to solve that question:
sin x = 2t/(1+t^2 ) and cos x = (1t^2)/(1+t^2) then substitute into your equation then solve for t.
remember: t = tan 1/2(x) the use it to find the value of x then you'r done!!


 