Question

find the trigonometry ratios
viii(cos 1000​

Answer 1

Answer: ∴ cos (1000°) ≡ cos 80° ≡ sin 10°

Step-by-step explanation:

cos (1000°)

= cos (90° × 12 - 80° )

[The positive x axis starts with the angle 0°,

so at (90×12)°, it will be in the positive x axis,

and with the -80°, it lies in IV quadrant, where cos is positive ]

= cos (80°)

OR

cos (1000°)

= cos (90° × 11 +10°)

[The positive x axis starts with the angle 0°,

so at (90×11)°, it will be in the negative x axis,

and with the +10°, it lies in IV quadrant, where cos is positive ]

= sin 10°

Answer 2

Answer:

sin=10 o

is your answer

hope it helps