help@askiitians.com

+91-735-322-1155

Trigonometry> how can we find the value of sin22degree ...

question mark

how can we find the value of sin22degree or all such angles?

vaishali chandel , 11 Years ago

Grade 12

4 Answers

Satyajit Samal

Last Activity: 11 Years ago

If you mean sin 22.5 degree, then we can find it using sin half angle formula.
$\sin 22.5^{o}=\sin \frac{45}{2}^{o}= \sqrt {\frac{1- \cos 45^{o}}{2}}\\ = \sqrt {\frac{\sqrt{2}-1}{2 \sqrt{2}}}$
sin 22 degree can not be found using this method. One way to find approximate value of sin 22 degree is to convert degree into radian and then use the sin x expansion formula: $\sin x = x - \frac{x^3}{3!}+\frac{x^5}{5!}-\frac{x^7}{7!}+............$
Hope that clears your doubt.

vaishali chandel

Last Activity: 11 Years ago

please give me more explanation for expansion of sin22 degree

vaishali chandel

Last Activity: 11 Years ago

please give me more explanation for expansion of sin22 degree

Kartik Sawant

Last Activity: 10 Years ago

Thanks to the expert, i got answer to another question.

LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

Full Live Access

Study Material

Live Doubts Solving

Daily Class Assignments

In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.

trigonometry

1 Answer Available

Last Activity: 3 Years ago

Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720

trigonometry

1 Answer Available

Last Activity: 3 Years ago

To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA

trigonometry

1 Answer Available

Last Activity: 3 Years ago

Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)

trigonometry

1 Answer Available

Last Activity: 3 Years ago

WHAT IS THE LIMIT WHEN X TOWARDS TO 0 OF sin6x/5x ? lim𝑥→0 𝑠𝑖𝑛6𝑥/5𝑥

trigonometry

1 Answer Available

Last Activity: 3 Years ago

View all Questions