Answer:
Step-by-step explanation:
Hint: 1- 2sin²x = Cos 2x
LHS = 1 - 2Sin² (π/4 - Ф/2)
= Cos 2 *(π/4 - Ф/2)
= Cos 2*π/4 - 2*Ф/2
= Cos π/2 - Ф
= Sin Ф = RHS
1 ——> given
2 —-> vertical angles are equal.
3 —> substitution
4 ——> if lines are || , corresponding angles are equal.
Answer: 4.2
Step-by-step explanation: 20 x 21
100
= 4.2
Answer:
y=1.7x
Step-by-step explanation:
yo yo, yo yo, yo yo, yo yo, yo yo, yoo