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Free webinar on Robotics (Block Chain) Learn to create a Robotic Device Using Arduino
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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+sin a =9 cos aDivide by cosa to the whole eqn.,seca + tana = 9seca = 9 – tanasq. both sides,sec^2a = 81 + tan^2a – 18tana1 + tan^2a = 81 – 18tana + tan^2atan^2a got cancel.80 = 18tanatana = 80/18tana = 40/9Now find cosa and cross check the options now.
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