diwashkandel6pe02af diwashkandel6pe02af
  • 02-02-2019
  • Mathematics
contestada

tan65°-tan25°=2tan40° prove !!!

Respuesta :

singlegirlforlife541
singlegirlforlife541 singlegirlforlife541
  • 02-02-2019

Answer:

tan65 - tan40 = tan 25 + tan 40 .

using tanA - tan B =sin(A - B)/cosAcosB and tanA + tan B

= sin( A + B)/cosAcosB

= we get :: to prove sin 25/ cos65

= sin65 / cos25 sin 25 = cos (90 - 25)

= cos 65 and sin 65

= cos (90 - 65)

= cos 25

-Leah

Answer Link

Otras preguntas

What is a great risk factor for a stroke?
You should eat_____grams of carbohydrates per pound of body weight
a baker made 7 batches of muffins there wad a total of 252 muffins if there was the same number of muffins in each batch how many muffins were in a batch
Alflati valoarea lui a din egalitatile (8×a-7×a)×6=6. (125×a-124×a)×1=6
how can the fish eating bird have 5 ppm of ddt when the water only started with 0.003ppmm of ddt
Thirteen and eight tenths
Evaluate 5/9(f-32) when f=50
He has made judges dependent on his will alone, for the tenure of their offices, and the amount and payment of their salaries
If a cell continues to grow, the ratio of _ are to _ will continue to _
Is freshly squeezed orange juice a single element?