Question

if tan x =-4/3, find the vakue if 9 sec^2 x -4 cot x ​

Answer 1

Answer:

13

Step-by-step explanation:

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Answer 2

Tan X =-4/3

SinX/cosX=-4/3

Then sinX=-4 , cosX=3

9sec²X-4cotX=?

=9(1/cosX)²-4(cosX/sinX)

=9(1/3)²-4(3/-4)

=9(1/9)-(-3)

=1+3

=4

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