Question

TRIGONOMETRIC RATIOS
14. Write the value of tan 10° tan 15° tan 75º tan 80°.
3.
15. If A + B = 90° and tan A what is cot B?
4
5
16. If tan A
, find the value of (sin A + cos A) sec A.
12​

Answer 1

14). 1

Tan10.tan 15 tan( 90-10) Tan( 90-15)

= Tan10tan15cot10cot15

= 1

15) make sure it is right

16) make the question clear