Activity-trigonometry problems
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Problem-1
prove that
Interpretation of problems
- It is to prove the problem based on trigonometric identities
- the function of one trigonometric ratio is relates to other
Concept development
Develop the skill of proving problem based trigonometric identity
Skill development
Problem solving
Pre Knowledge require
- Idea about trignometric ratios
- Idea about trignometric identities
Methos Of Solutions
Generalisation By Verification
When A=60°
LHS=Failed to parse (syntax error): {\displaystyle \frac{1-\tan^2 60°}{1+\tan^2 60°}}
=
=
=
=-----(1)
RHS=
=Failed to parse (syntax error): {\displaystyle 1-2\sin^260° }
=
=
=------(2)
from eqn1 & eqn2
Failed to parse (syntax error): {\displaystyle \frac{1-\tan^2 60°}{1+\tan^2 60°}}
=Failed to parse (syntax error): {\displaystyle 1-2\sin^260° }
By Generalisation
By Deductive Proof
LHS=
=
=
=
==RHS