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44 votes
44 votes
Solve the equation sin(S - 20%) = cos(429) for x, where 0 ОА.

68
OB
28
ОС,
62
OD 22

Solve the equation sin(S - 20%) = cos(429) for x, where 0 ОА. 68 OB 28 ОС, 62 OD 22-example-1
User Agila
by
3.2k points

1 Answer

18 votes
18 votes

Answer:

A)
68

Explanation:


sin(x^\circ-20^\circ)=cos(42^\circ),0<x<90


sin(x^\circ-20^\circ)=cos(42^\circ)


sin(x^\circ-20^\circ)=sin(90^\circ-42^\circ)


sin(x^\circ-20^\circ)=sin(48^\circ)


x^\circ-20^\circ=48^\circ


x^\circ=68^\circ

Helpful Tips:

Cofunction Identity -->
sin(90^\circ-x^\circ)=cos(x^\circ)

User Keith Bloom
by
2.9k points