Question

1) sin x . cot x= cos x
2) Cot x. cos x + sin x= cosec x

buktikan!

Answer 1

1) sinx. cotx = cos x

Sin x. Cosx/sinx = cosx

Cos x = cos x (terbukti)

2)cot x.cos x+ sin x= cosec x

Cosx/sinx .Cos x+ sin x = cosec x

Cos²x/sinx +sinx = cosec x

Cos²x/sinx + sin²x/sin x= cosec x

(Cos²x+sin²x)/ sinx = cosec x

1/ sinx. =. 1/sinx

Terbukti

Answer 2

1).



2).



Terbukti :)