Question

Sin 7theta = Cos 20 ° then
the value of theta??​

Answer 1

Step-by-step explanation:

sin7∅ = cos 20

sin7∅ = sin[90-20]

sin7∅ = sin70

Thus,  ∅ = 10

Hope it helps

Mark it as the brainliest

Answer 2

Answer:

sin 7theta = cos 20°

sin 7theta = sin (90°-20°)

7theta = 70°

theta = 70° /7

theta = 10°