Question

tan25+tan20+tan25tan20=1 prove that
Step by step​

Answer 1

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tan25+tan20+tan25tan20=1 prove that

Step by step

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tan(A+B)= 1−tanAtanB

tanA+tanB

put A=20, B=25

tan(20+25)= 1−tan20tan25

tan20+tan25

tan(45)= 1−tan20tan25

tan20+tan25

1= 1−tan20tan25

1. tan20+tan25

tan20+tan25=1−tan20tan25

tan20+tan25+tan20tan25 = 1

☞$\huge\red{FinalSolution=1}$

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✍ Quality Answers

Answer 2

Step-by-step explanation:

draw the angles of the followings measurces and determine their quadrants -140