Trig Doubt

Question 18: If \( \tan \theta = \frac ab\), show that \( \frac{a \sin \theta - b \cos \theta}{a \sin \theta + b\cos \theta} = \frac{a^2-b^2}{a^2+b^2} \).

Note by Swapnil Das
3 years ago

No vote yet
1 vote

  Easy Math Editor

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list

  • bulleted
  • list

1. numbered
2. list

  1. numbered
  2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
    # 4 spaces, and now they show
    # up as a code block.

    print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.
2 \times 3 \( 2 \times 3 \)
2^{34} \( 2^{34} \)
a_{i-1} \( a_{i-1} \)
\frac{2}{3} \( \frac{2}{3} \)
\sqrt{2} \( \sqrt{2} \)
\sum_{i=1}^3 \( \sum_{i=1}^3 \)
\sin \theta \( \sin \theta \)
\boxed{123} \( \boxed{123} \)

Comments

Sort by:

Top Newest

Just divide the numerator and denominator of the LHS by \( \tan\theta\)

Aditya Chauhan - 3 years ago

Log in to reply

Thank you for helping!

Swapnil Das - 3 years ago

Log in to reply

No problem

Aditya Chauhan - 3 years ago

Log in to reply

Comment deleted Jun 14, 2015

Log in to reply

RD Sharma- 11

Swapnil Das - 3 years ago

Log in to reply

Use componendo dividendo

Aditya Kumar - 3 years ago

Log in to reply

Whoever edited it, Thanks!

Swapnil Das - 3 years ago

Log in to reply

×

Problem Loading...

Note Loading...

Set Loading...