Question

Prove that, (secθ +cosθ)(secθ-cosθ)-2+2cos²θ = tan²θ.sec²θ

Answer 1

i m getting tan²theta*cos²theta

Answer 2

Sum of interior opposite angles = exterior angle

25 ° + X =70 °

= 70 - 25 ° = 45 °

X=45°