(cos(x+y))/(cosxcosy) = 1 - tanx tany Prove the identity. I'm lost after the second step. Please attempt to write nice

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(cos(x+y))/(cosxcosy) = 1 - tanx tany Prove the identity. I'm lost after the second step. Please attemptto write nicely, I have a reading disability and struggle withreading words, especially if messy. Thank you for supportingme!!!!

Cos X Y Cosxcosy 1 Tanx Tany Prove The Identity I M Lost After The Second Step Please Attempt To Write Nice 1 (34.73 KiB) Viewed 31 times

Prove the identity. cos (x+y) COS.x cosy Note that each Statement must be based on a Rule chosen from the Rule menu. To see a detailed description of a Rule, select the More Information Button to the right of the Rule. Statement = 1- tanx tany cos (x + y) cosx cOSy secy cos (x + y) secx Rule Reciprocal ロ・ロ cos olo sin cot ☐sec ☐tan csc

Select the Rule O Algebra O Reciprocal Quotient O Pythagorean O Odd/Even O Double-angle O Sum and Difference X