Cosx/(1+sinx) = (1-sinx)/cosx verify this identity

calculate the left side:

cos x / (1+ sin x)

 multiply by (1- sinx/1-sinx)

 to get

cos x (1-sinx) / (1+sinx)(1-sinx)

simplify the numerator than the denominator to get

cosx - cosx sinx / 1-sin^2x

 apply Pythagorean identity to get

 cos x - cosx sin x / cos^2 x

 which simplifies to

1-sinx/cos x which equal the right side so it is true

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168

it's 100

step-by-step explanation:

22, 28, 34, 40, 46

b)   f(n) = 6n + 16

  n = what is the number of the row ( 22 would be row 1) so if we replaced n with 1, we would get 22

c)   the  14th  row will have 100 seats

(1)   (2)   (3)   (4)   (5)   (6)   (7)   (8)   (9)   (10) (11) (12) (13) (14)

22 | 28 | 34 | 40 | 46 | 52 | 58 | 64 | 70 | 76 | 82 | 88 | 94 | 100

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