Question

if tanα•tanβ = tan45°, then ths value of cosα - sinβ is
(a)
$\geqslant 0$

(b)
$1$

(c)
$\geqslant 0$

(d)
$0$
​

Answer 1

Answer:

if tanα•tanβ = tan45°, then ths value of cosα - sinβ is

Answer 2

Answer:

Hope it's correct thank you