Given: sin 𝛳 =We know that, sin2 θ +cos2 θ =1⇒ sin2 A = 1-cos2 A⇒ sin A = √ (1-cos2 ASo, cos 𝛳 = √(1-a2/b2 ) = √((b2-a2)/b2 ) = √(b2-a2 )/bHence, the answer is √(b2 - a2 )/b

Q. 43.6( 17 Votes )

<span lang="EN-US

Class 10th NCERT - Maths Exemplar 8. Introduction to Trigonometry and Its Applications

Answer :

Given: sin 𝛳 =

We know that, sin² θ +cos² θ =1

⇒ sin² A = 1-cos² A

⇒ sin A = √ (1-cos² A

So, cos 𝛳 = √(1-a²/b² ) = √((b²-a²)/b² ) = √(b²-a² )/b

Hence, the answer is √(b² - a² )/b

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUS<span lang="EN-US NEXT<span lang="EN-US

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation

view all courses