Demuestre las siguientes identidades. 1) Cos x Sec x =1 2) Sen x Csc x =1 3) (1 + Cos x)(1 - Cos x) = Sen2 x 4) 1− 2 = csc b 5) 2 + sen y = csc y 6) Tg 2 x cos2 x = 1 – cos2 x 7) csc + = cos y 8) Sec x + tg x = cos 1− 9) 1+ = 1 + csc y 10) 2 − 2 = sen y

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation:

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

x = 12

y = 1

for the points!

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?