owlghuieMa6riel4 owlghuieMa6riel4

19-11-2016
Mathematics

contestada

prove:
tan 70° = tan 20° + 2tan 50°

Respuesta :

19-11-2016

As we all know,
According to the trigonometric identity,
tan70=tan(20+50)
tan70=(tan20+tan50)/1-tan20tan50
tan70-tan20tan50tan70=tan20+tan50
Also tan70tan20=tan70cot70=1
Hence
tan70-tan50=tan20+tan50
So tan70=tan20+2tan50
Hope this helps :) :)

Answer Link

syed514 syed514

20-11-2016

tan(70-20)=tan50
tan70-tan20/1+tan20 tan70=tan50
tan20 tan70=cot70 tan70=1
tan70-tan20/2=tan50
tan70-tan20=2tan50
tan70=tan20+2tan50

Answer Link

ACCESS MORE ACCESS MORE ACCESS MORE ACCESS MORE

Otras preguntas

Jim paddles from one shore of a lake 3 miles wide at 4 mph, and John paddles from the opposite shore at 5 mph. How long will they travel before they meet? A

The length l of a rectangle is 4 inches greater than its width w. The area of the rectangle is 252 square inches.Using the method of completing the square, what

Evaluate the following expression (a + b)^0

what is the name o a government where the legislative branch is more powerful than the executive branch

If a scale model of a building is 5 inches wide by 7inches long. if the scale is 1 in.:15ft,how long is the building?

. Which rhetorical device is used in this statement from Dr. Martin Luther King Jr.’s speech “I Have a Dream”? I have a dream that one day this nation will ris

18000 decrease by 15% every year for 3 years

Which of the reforms of Khrushchev and Gorbachev were MOST similar? A - In their approach to working with the United States B- Their view of nuclear arms C -T

How many sides does a regular nonagon have?

Napoleon chagnon's visit to the yanomamö tribe, where he observed tribe members appearing naked in public, using hallucinogenic drugs, and letting mucus hang fr