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weqwewe [10]
3 years ago
7

Answer For Brainliest

Mathematics
1 answer:
liq [111]3 years ago
8 0

Answer:

the answer is D

Step-by-step explanation:

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Prove : (sec θ - tan θ )^2 = 1 - sin θ /1+sin θ
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(sec x - tan x)^2 \\  \\ = sec^2x - 2 sec x tan x + tan^2 x \\  \\ =(1+tan^2 x) - 2 sec x tan x +tan^2 x \\  \\ =1 - 2 sec x tan x + 2 tan^2 x \\  \\ = 1 - 2tan x(sec x - tan x) \\  \\ =1 - \frac{2 sin x}{cos x} (\frac{1-sin x}{cos x}) \\  \\ = 1 - \frac{2 sin x (1-sin x)}{cos^2 x} \\  \\ =1 - \frac{2 sin x (1-sin x)}{1-sin^2 x} \\  \\ =1 - \frac{2 sin x (1-sin x)}{(1-sin x)(1+sin x)} \\  \\ =1-\frac{2 sin x}{1+sin x}
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2 years ago
2. How many solutions does the below system of equations have?
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3 years ago
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