3 years ago

How do I prove that (1+sinx)/cosx=cos(-x)/(1+sine(-x))

1 answer:

5 0

$\dfrac{1+\sin x}{\cos x}=\dfrac{\cos (-x)}{1+\sin(-x)}\\
\dfrac{1+\sin x}{\cos x}=\dfrac{\cos x}{1-\sin x}\\
\cos^2 x=(1+\sin x)(1-\sin x)\\
\cos^2 x=1-\sin^2 x\\
\sin^2 x+\cos^2 x=1
$

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Read 2 more answers

Find the solution of 3 times the square root of the quantity of x plus 6 equals negative 12, and determine if it is an extraneou

Anna35 [415]

For this case we have the following equation:
$3 \sqrt{x+6}=-12$
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3 years ago

HELP ME PLEASE !!!!!!!!

andre [41]

Answer:

3 is yes, the rest is no

Step-by-step explanation:

for y = -6x - 9

(1) if x = 7, y = -51 => No

(2) if x = 3, y = -27 => No

(3) if x = -8, y = 39 => Yes

(4) if x = -5, y = 21 => No

8 0

2 years ago