Math
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I am not exaclty sure how to solve this question can someone help?
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Amr Alaa
Verified teacher · 12d ago
You could let u = sinx so it's just u²-u-1=0 do you solve it using the general formula or the calculator to get (2u+1)(u-1) so you get u = 1 and u=-1/2 and we said u = sinx so x = sin inverse of 1 and -1/2 to get 90 , 210
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Sameh Ezzat
Verified teacher · 11d ago
Check this answer below
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