if 1+sin a =9 cos a then 5(1-cos a)= sin a 2 sin a 4 isn a tan a

Question

Vikas TU · Answer

1+sin a =9 cos a Divide by cosa to the whole eqn., seca + tana = 9 seca = 9 – tana sq. both sides, sec^2a = 81 + tan^2a – 18tana 1 + tan^2a = 81 – 18tana + tan^2a tan^2a got cancel. 80 = 18tana tana = 80/18 tana = 40/9 Now find cosa and cross check the options now.

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if 1+sin a =9 cos a then 5(1-cos a)= sin a 2 sin a 4 isn a tan a

if 1+sin a =9 cos a then 5(1-cos a)=

sin a

2 sin a

4 isn a

tan a

1 Answers

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