Question

If x = a cos 30°, y = b sin 30°, then
x²/a²+y²/b²=
(A) a²
(B) b²
(C) 1
(D) a² + b²​

Answer 1

Given X= a cos theta ………..(1)

Y=b sin theta…………..(2)

And

for remove theta

Then

Y/ b = sin theta (from 2)

X/a =cos theta (from 1)

We know that

sin theta^2+cos theta^2=1 ………..(3)

Put the above values in equation in (3)

(Y/b)^2 + (X/a)^2 =1

Hence, option C is correct.

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Hope it Helps Bud!

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Also tell me why u reported that answer which i gave u before this??? Why?? It was perfect ecplaination, idk who did it, but those poeple dont deserve this app!