18mcdonalda 18mcdonalda

29-07-2017
Mathematics

contestada

Simplify the following, tan -x cos -x

Respuesta :

mathmate mathmate

29-07-2017

Tan(A)=sin(A) / cos(A)
so
tan(A)*cos(A)=sin(A)/cos(A)*cos(A)
=sin(A) [ by cancelling cos(A) ]

substitute -x for A, then
tan(-x)cos(-x) = sin(-x)
[ provided cos(-x) does not equal zero, i.e. x does not equal (k+1/2)pi where k is an integer ]

Answer Link

Otras preguntas

You throw a ball straight up in the air trying to throw it as high as possible. What do you think happens to the balls kinetic energy as it rises?

Find each sum. (3n2 – 5n + 6) + (–8 n 2 – 3n – 2) =

What factors contribute to the increased rigidity of racial segregation and renewed white efforts to exclude blacks from political life in the late 1800s?

Salim bought a DVD recorder for $280 now it is on sale for $220 find the percent of change in the price from the nearest whole percent

What are different kinds of barriers to movement

I need the description of how to draw a parallel line and a perpendicular line.

Fly ash from a thermal power utility is settling in the surrounding fields and destroying the barley that farmers have planted there. the law is on the farmers'

Why and how did europeans openly challenge the catholic church, church doctrine, and the bible?

You are writing a literary analysis essay on Shakespeare's Macbeth. Which of the following is a reliable source of information on the topic?

A person who does really bad things a christmas carol

RELAXING NOICE