Math, asked by yogendersharma501, 3 months ago

prove that 4cosA (60°-A) cos (60°-A) =cos3A

Answers

Answered by diyamerin06

0

Answer:

cos(A-B)cos(A+B) = cos2B- sin2A ==> L.H.S = 4cosA (cos2A - sin260) = 4cosA (cos2A - 3/4)

=4cos3A -3cosA = cos3A =R.H.S .Hence proved

hope it helps you

stay safe

Previous Question

Next Question

Similar questions

Physics, 1 month ago

please ans this question step by step...

Chemistry, 1 month ago

Which Is Best For Inverter Battery Distilled Water Or Normal Water...

Science, 1 month ago

5. What is food ? Describe various components of human food, 6. Give an account of Mid-day Meal Scheme of our Government. give me all answers please...

Math, 3 months ago

IF THE PRICE OF VEGETABLES INCREASES BY 20%, BY WHAT PER CENT SHOULD VARUN REDUCE HIS CONSUMPTION SO THAT HIS EXPENDITURE ON VEGETABLES REMAINS THE SAME.

Math, 3 months ago

What should be subtracted from 2x³-3x²y+2xy² + 3y³ to get x³ - 2x²y+3xy²+4y³ ?

Math, 9 months ago

Using Euclid's division algorithm find the HCF of the following step by step explaination 48 and 108 (Answer is 2 but how, I want it's explanation )...

Biology, 9 months ago

water pollination 4 points...

Math, 9 months ago

Add 10 th question's answer pls First one I'll mark it as brainy answer...