Question

If x =

sin 80 ° cos 220 °, y = cos (-80 °) sin 220 °. then​

Answer 1

Step-by-step explanation:

Multiplying and dividing by

2

=

2

(

2

sin80

0

−

2

cos80

0

)

=

2

[sin(80

0

−45

0

)]

=

2

sin35

0

Hence False.

Alternatively,

sinθ increases as θ increases.

While cosθ decreases as θ increases. for 0≤θ≤90

0

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