Question

sin x=3/5
x = 3rd quadrant ..

Answer 1

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please refer to the attachment above.....

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Answer 2

HEYA! !
ANSWER - : ✔ ✔
sinx=-3/5 (correction)

IN Q3 ,cosine<0

[o,h,a]=[3,5,4]

cosx=-4/5=2cos²(½x)-1

2cos²(½x)=1–(4/5)=1/5

cos²(½x)=1/10

cos(½x)=±√(1/10)

Hope it helps you