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In algebra and trigonometry we can have various functions such as sin, cosine , tan and sec and to solve trigonometric equations we should know relation between them .

sec x = 1 / cos x.

tan x = sin x/ cos x.

(1- sinx )/ cos x.

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9y ago

It generally helps, to manipulate such expressions, if you write everything in terms of sines and cosines.

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