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Prove that (secA+tanA-1)(secA-tanA+1)=2/cotA

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Prove that (secA+tanA-1)(secA-tanA+1)=2/cotA

Posted by Gungun_ U Can Wish Me On 3 Feb.....? 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Gungun_ U Can Wish Me On 3 Feb.....? 6 years, 10 months ago

Atleast answer to mila mujhe

0Thank You

Puja Sahoo? 6 years, 10 months ago

Yup, se...here ..---> (secA+tanA-1)(secA-tanA+1) -----> (secA +tanA-1){secA-(tanA-1)}..................... ----->sec square A - ( tanA - 1)square ................... ------> sec square A-(tan square A+1-2tanA) ........ ----> sec square A-tan square A - 1+ 2 tanA......... ----> 1-1+2tanA........ ----> 2tanA..... ------> 2/ cotA.. HENCE PROVED......☺☺

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Posted by Kanika . 1 month, 1 week ago

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CBSE > Class 10 > Mathematics

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CBSE > Class 10 > Mathematics