If sin \theta= 3/5 Findcos \theta \ and \ tan\theta | Filo
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Class 10

Math

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Introduction to Trigonometry

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If  

Find

Solution:  be a right angled at B
Let
Given that, sin  = 3/5
AB/AC = 3/5
Let AB = 3x
then AC = 5x
In right angled ,
By Pythagoras theorem,
We get




(i) cos  = Base/ Hypotenuse
= BC / AC
= 4x /5x
= 4/5
(ii) tan = perpendicular/Base
= AB/BC
= 3x/4x
=3/4
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