Tan x= sin x/cos x. therefore, tan (90-a)°= ? (all angle measurements are in degrees) a.) 1/tan(90-a) b.) 1/sin a c.) 1/cos(90-a) d.) 1/tan a

THIS USER ASKED 👇

Tan x= sin x/cos x. therefore, tan (90-a)°= ? (all angle measurements are in degrees) a.) 1/tan(90-a) b.) 1/sin a c.) 1/cos(90-a) d.) 1/tan a

THIS IS THE BEST ANSWER 👇

In the first quarter, tactile, sine and cosine function are all positive.

So tan (90-A) = sin (90-A) / cos (90-A) = cos (A) / sin (A) = 1 / tan (A)

The answer is d