Question

12.
Prove that
1 + cos
tan?
(sec 0-12
(ICSE 2012)
1 - cos e​

Answer 1

Step-by-step explanation:

(1+sin Ѳ)(1-sinѲ)/(1+cosѲ)(1-cos Ѳ) = (1−sin2Θ)/(1−cos2Θ)

= 1−(8/113−−−√)2/1−(7/113−−−√)2

= {1-(64/113)}/{1-(49/113)} = {(113-64)/113}/{(113-49)/113} = 49/64