Prove that (cos 2A - cos 2B)^2 + (sin 2A - sin 2B)^2=4sin^2(A-B)....please help me to solve this trigo question...thank u
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Hint: within the parentheses, use sum to product identities, and you will have it in a few steps.
can anyone please show me the first step...please
Can you proceed now?
im still having problem with this question....
Originally Posted by sharmala im still having problem with this question.... Show your problem.
We will need these two identities: . . . .
Expand the left side: . . . . . . . . . . . . . . .
In case you wanted to continue with the formulas of Simpson.
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