Question

if sinA= 1 then this value lies in
(1) first quadrant, (2) 2nd quadrant, (3) both 1st and 2nd
(4) not in any quadrant but on (+ve) Y-axis
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Answer 1

Answer:

(4) not in any quadrant but on (+ve) Y-axis

Step-by-step explanation:

sinA= 1

we know that,

$\sin( \alpha ) =1 \\ so \: \\ \alpha = {90}^{o}$

so, a= 90 degrees

therefore a lies on y- axis.