Learn to Create a Robotic Device Using Arduino in the Free Webinar. Register Now
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Free webinar on Robotics (Block Chain) Learn to create a Robotic Device Using Arduino
30th Jan @ 5:00PM for Grade 1 to 10
The number of values of theta which satisfy the equation 6sin ^( 3 )theta+ 25sin ^( 2 )theta- 39sin theta- 70 = 0 is ] The number of values of theta which satisfy the equation 6sin^(3)theta+25sin^(2)theta-39sin theta-70=0 is ]
Let sinx=s.So 6s^3 is less than or equal to 6.25s^2 is less than or equal to 25.-39s is less than or equal to 39.Add all these inequalities to get6s^3+25s^2-39s is less than or equal to 70.But this expression is given to be equal to 70 in the question. Hence equality should hold in all cases, i.e, 6s^3=6, 25s^2=25, -39s=39.However, there exists no value of s for which all these equations simultaneously hold true. Hence, no/zero solutions exist.KINDLY APPROVE :))
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -