Question

7. Find the value of: *
(2 Points)
tan 10 tan 20" tan 30° tan 40" tan 50" tan 70° tan 80%​

Answer 1

Step-by-step explanation:

tan10×tan20×tan30×tan40×tan50×tan70×tan80

tan theta= cot( 90- theta) tan30=1/root3

tan10×tan20×1/root3 × tan40×cot(90-50)×cot(90-70)×cot(90-80)

tan10×tan20×1/root3×tan40×cot40×cot20×cot10

cot theta= 1/tan theta

tan10× tan20×1/root3×tan40×1/tan40×1/tan20×1/tan10

1/root3

HOPE YOU WILL GET YOUR ANSWER