Question

If x=acos4θ and y=bsin4θ , then xa−−√+yb−−√=
1. 0
2.-1
3. 2
4. -1​

Answer 1

Step-by-step explanation:

Correct option is C)

x=a×cos

4

θ

y=b×sin

4

θ

find

a

x

+

b

y

,

a

x

=cos

4

θ

b

y

=sin

4

θ

a

x

+

b

y

=

cos

4

θ

+

sin

4

θ

cos

2

θ+sin

2

θ

=1