Solution

prove

Solution

Solution steps
Manipulating left side
Rewrite using trig identities
Use the Pythagorean identity:
Add similar elements:
We showed that the two sides could take the same form

Popular Examples

prove tan(2A)-2tan(2A)sin^2(A)=sin(2A)prove sin^2(x)= 1/(csc^2(x))prove (cot(4u)-1)/(cot(4u)+1)=(1-tan(4u))/(1+tan(4u))prove sin(-x)=sin(x-pi)prove sin(4a)=4sin(a)cos(a)cos(2a)

Frequently Asked Questions (FAQ)

  • Is sin^2(a)-cos^2(a)=1-2cos^2(a) ?

    The answer to whether sin^2(a)-cos^2(a)=1-2cos^2(a) is True