Question

19. If tan A = 0.75, find the value of : (i) sec A, (ii) cosec A​

Answer 1

Answer:

i)5/4

ii)5/3

Step-by-step explanation:

$tan \: a = \frac{3}{4} \: \: so \: a = {tan \frac{3}{4} }^{ - 1} \\ a = 37degrees$

i)

$sec \: a = sec \: 37 = \frac{1}{cos \: 37} = \frac{1}{ \frac{4}{5} } = \frac{5}{4}$

ii)

$cosec \: a = cosec \: 37 = \frac{1}{sin37} = \frac{1}{ \frac{3}{5} } = \frac{5}{3}$

plz mark my answer as brainlist so that u will get fast answer and correct answer!!!!

Answer 2

Step-by-step explanation:

see

0.75=3/4

so what you have to do

is to form a triangle say ABC

Right angled at B as shown in figure.

As tanA=BC/AB

WE CAN SAY THAT BC/AB=3/4

Now by Pythagoras theorem

AC = 5

Now you can answer any question .

(1)

SecA = HYPOTENUSE/BASE

= 5/4

(2) CosecA= HYPOTENUSE/PERPENDICULAR

=5/3

.

Hope you like it.