cos²Φ+sinΦ+1=0
solve for Φ
Hint: use identity formula sin²Φ+cos²Φ=1
Answers
Answered by
1
Answer:
270 degree
Step-by-step explanation:
equations becomes
sin^2x - sinx -2=O
sin^2x - 2sinx + sinx -2 =0
Sinx(Sinx-2) +1(Sinx-2)=0
(Sinx+1)(Sinx-2)=0
Sinx cant be greater than 1
hence sinx=-1
x will be 270 degree
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