Question

write trignomentric basic rules.

Answer 1

trigonometric basic rules are
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consider in a right angles triangle

$\sin( \alpha ) = height \div hypotenus \\ \cos( \alpha ) = base \div hyotenus \\ \tan( \alpha ) = height \div base \\ \cot( \alpha ) = base \div height \\ \sec( \alpha ) = hypotenus \div base \\ \csc( \alpha ) = hypotenus \div height \\ \\ and \: all \: other \: trignometric \: functions \: are \: derived \: from \: it.$

Answer 2

Hey mate!!✋

Here is your answer

★★★★★★★★★★★★★★★★★★

Trigonometric basic rules:

Firstly every sign we should use A or theta,alpha,gama,beta,phy,omega etc for the angel. Like : sinA, cosA

→sine = opposite side/hypotenuse

> The opposite of is cosecant = hypotenuse/opposite side.

=> sinA = 1/cosecA

→cosine = adjacent side/hypotenuse

>The opposite of cosine is secant = hypotenuse/adjacent side

=> cosA = 1/secA

→ tangent = opposite side/adjacent side

>The opposite of tangent is cotangent= adjacent side/opposite side

=> tanA = 1/cotA

* There are many relations between them.They are :
→ tanA = sinA/cosA
→cotA = cosA/sinA

>sin²A+cos²A=1
>sec²A-tan²A=1
>cosec²A-cot²A = 1

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Hope it will help you,friend. :)