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
If sinx + sin 2 x + sin 3 x = 1,then find the value of cos 6 x - 4cos 4 x + 8cos 2 x. If sinx + sin2x + sin3x = 1,then find the value of cos6x - 4cos4x + 8cos2x.
Write sinx + sin2x + sin3x = 1, as:sinx + sin3x = 1 – sin2xNow squaring both sides,U would get,sin^6x + sin^4x + 3sin^2x = 1and write each sin^2x to (1-cos^2x) => (1-cos^2x) ^3 + (1-cos^2x)^2 + 3(1-cos^2x) = 1 ould get further cos6x - 4cos4x + 8cos2x. value as 1.
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -