Question

If 5cos theta=4,find the value of 1-tan²theta/sec²theta​

Answer 1

Answer:

here 5cost=4 so cost= 4/5 now 1-tan^2t/ sec^2t=sec^2t-tan^2t÷sec^2t = 1/sec^2t=cos^2t = 16/25 where t= theta.

Step-by-step explanation:

on sec^2t -tan^2t use the identity tan^2t= sec^2t-1 in order to convert tant into sec t