Ang kasalanan ba ^ 2theta-cos ^ 2theta = 1-2sin ^ 2theta?

Sagot:

#"Hindi"#

# "Halos:" #

# sin ^ 2 (theta) - cos ^ 2 (theta) = 2 sin ^ 2 (theta) - 1 #

Paliwanag:

# sin ^ 2 (theta) + cos ^ 2 (theta) = 1 #

# => sin ^ 2 (theta) - cos ^ 2 (theta) #

# = sin ^ 2 (theta) - (1 - sin ^ 2 (theta)) #

# = 2 sin ^ 2 (theta) - 1 #

Sagot:

Walang katumbas na # 2sin ^ 2theta-1 #

Paliwanag:

Mula noon # cos ^ 2theta = 1-sin ^ 2theta #

Paglalagay ng halaga # cos ^ 2theta # sa orihinal na equation na nakukuha natin

# 2sin ^ 2theta-1 #