Math, asked by naimuddin40, 1 year ago

If cosx+sinx=7/5then what is solution of cotx/2​

Answers

Answered by vishwasslacek
1

Answer:

we know formula   sinx=2*tan(x)/2/(1+tan^x/2)    and cosx=( 1-tan^(x/2))/(1+tan^2(x/2))

let’s assume that tanx/2=p

put this value in given equation

2p/(1+p^2) + 7(1-p^2)/(1+p^2) =5

after solving we get 

6p^2 -p -1=0

2p-1=0    and 3p+1=0

p=1/2     and p=-1/3

tan(x)/2=1/2    and tan(x)/2= -1/3

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