Find the value of cos(90-A) -Sin A
Answers
Answered by
1
cos(90-A) =Sin A
=> cos(90-A) -Sin A = Sin A - Sin A = 0
Answered by
1
Answer:
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the third quadrant.
−
cos
(
90
)
The exact value of
cos
(
90
)
is
0
.
−
0
Multiply
−
1
by
0
.
0
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