pa help po please
trigonometric idnetities
show you solution
1. sin^3 x=sinx-sinxcos^2 x
2. sin^4 x- cos^4 x= sin^2 x- cos^2 x
3. tan(-θ)sin(-θ)+cos(-θ)=sec(-θ)
Answers
Answered by
1
Answer:
cos
A
+
cos
B
=
2
cos
(
A
+
B
2
)
cos
(
A
−
B
2
)
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