3 years ago

Find all solutions in radian [0,2pi) solve 4sinx= -cos^2x +4

1 answer:

8 0

I hope this helps you

-cos²x= sin²x-1

4.sinx = sin²x-1+4

sin²x-4.sinx +3=0

(sinx-3)(sinx-1)=0

sinx≠3

sinx =1

SİN90=1

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