# Activity-trigonometry problems

## Contents

**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°}}**

=

=

=**Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://en.wikipedia.org/api/rest_v1/":): {\displaystyle \frac{-2}{4}}**

=-----(1)

RHS=**Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://en.wikipedia.org/api/rest_v1/":): {\displaystyle 1-2\sin^2 A}**

=**Failed to parse (syntax error): {\displaystyle 1-2\sin^260° }**

=**Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://en.wikipedia.org/api/rest_v1/":): {\displaystyle 1-2(\frac{3}{4})}**

=

=------(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