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

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

Find the perimeter of the figure below. Notice that one side length is not given.

what is the answer to this question?? an object has a mass of 5g. what force is needed to accelerate it at 6 m/s2? a. 0.83 N b. 1.2 N c. 11 N d. 30 N

Help Multiply. (-5 5/8) x (-2 1/3) What is the product? Enter your answer as a simplified mixed number in the box

Emily completed reading 24/3 books in 32/4 days. Find the number of books she would have completed in one day.

.In "The Gift of the Magi," when Jim buys combs for Della, the irony is that Della had bought Jim a more expensive gift. Della’s hair held more jewels than a qu

In about one hundred words, explain the importance of symbolism to short stories.

Scott has a rope 8 metres long. He says, “I need 9 pieces each 0.89 metres long.” Will Scott have enough ribbon? Explain your answer

Is Argentina in the north hemisphere or south hemisphere

If p represents a number between 2 and 4 and q represents a number between 10 and 20, then q/p represents a number between...

Read the excerpt from Act V, scene iii of Romeo and Juliet. Montague: Alas! my liege, my wife is dead to-night; Grief of my son’s exile hath stopp’d her breath.