AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

If $cot θ = 2120$ , then find the value of $sin θ$ .

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

sin θ = 2129

sin θ = 2429

sin θ = 2029

sin θ = 2421

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Given that,

cot θ = 2021

.
Cotangent is a ratio of the side adjacent to the angle

θ

by side opposite to the angle

θ

. If k is any positive integer,

cot θ = 20 k 21 k ⇒ Adjacent side O p p o s i t e side = 20 k 21 k

Form a triangle with respect to

θ

with adjacent side as AB and opposite side BC.
Question Image

Applying Pythagoras theorem,

A C 2 = B C 2 + A B 2 ⇒ A C 2 = (21 k) 2 + (20 k) 2

⇒ A C 2 = 441 k 2 + 400 k 2

⇒

A C 2 = 841 k 2

⇒

A C = 29 k

Now,

sin θ = Opposite side H y p o t e n s u e ⇒ sin θ = B C A C ⇒ sin θ = 21 k 29 k ⇒ sin θ = 2129

Thus, the value of

sin θ

2129

Therefore, option 1 is correct.

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!