baemae8749 baemae8749
  • 19-07-2022
  • Mathematics
contestada

If a is an obtuse angle in a triangle and sin a = , calculate the exact value of sin 2a.

Respuesta :

devinclmnt
devinclmnt devinclmnt
  • 22-07-2022

Answer:

Step-by-step explanation:

cos A = √( 1 - (5/13)²) = √( 1 - 25/169) = √(144/169) = - 12 /13

in 2 A = 2 sin A cos A

sin 2 A = 2 *5/13 ( - 12/13 ) = - 120 / 169

the answer is -120/169

Answer Link

Otras preguntas

MY MOM COOK 1 POTATO IN 25 MINITES. HOW LONG WOULD IT TAKE TO COOK 5 POTATO
Atoms of two different elements must have different A. Electrical charges B. Number of neutrons C. Atomic numbers D. Energy levels
Please show work I will give brainlist to first response with work
Emerson struck out 112 times in 350 at-bats. Write a proportion to represent the percent of strikeouts per at-bats
The disease that affects our lungs is
What caused The Cambodian Genocide?
write a differences between naturalresources and economic resource​. please help
Best Answer gets Brainliest!!! PLZ help!
Solve the given system using elimination.
Students were asked to place a mint in their mouths and determine how long it took for the mint to dissolve. The condition of the mint varied in each student gr