Question

If
sectheta + tan theta = 1 then find sectheta=?

Answer 1

(sec@+tan@)=1,..........eq(1),

since

sec²@-tan²@=1,

then

(sec@+tan@)(sec@-tan@)=1,


1 × (sec@-tan@)=1,

(sec@-tan@)=1,.............eq(2),

now solving these two equations,we have


2sec@=2,

sec@=1,

sec@=sec90°,

@=90°