Question

1. If se = then the value of 2 cos2 theetha +2cot2 theetha-9​

Answer 1

Answer:

Sec = tan

Will only happen when value in 45 deg

Therefore, 2* cos (45 *2) +2* cot (45*2) - 9

= 2* cos 90 + 2* cot 90 - 9

= 2*0 + 2*0 - 9. Cos 90 =0 and cot 90=0

=0+0-9

=(-9)

-9